I’m going to throw out a different direction for a solution towards allowing for X being shorter than Y. Although, this might go against the keep the table simple philosophy.
What does your space look like?
Maybe there are other options to allow for better using that space.
Maybe you could put the table on wheels and roll it out when you need to use it.
Maybe you could remove the LR4 from the table and fold it up against a wall.
This is a great thread about the design choices, nice work from the crew!
It has all already been answered but maybe I can summarize.
-The geometry is such that the Y axis is always the stronger one. The fastest/most rigid/most accurate (how every you choose to look at it) way to build it is X being shorter.
-You absolutely can build it the other way. Everyone here has laid out all the options to do that.
-Jason has suggested all the alternatives to your confined workspace.
The answer is simple. The primary goal is the most efficient design I could achieve the fastest, most accurate machine I could for the money that is easily sourced worldwide that requires very few special tools or extreme accuracy to build that can handle full sheet material.
Secondary, I DID account for your special case. You absolutely can build it backwards and sideways like you want, you are just choosing not to use pins or any of the other options to cut your strut plates. We also accounted for homing in any direction.
Thank you very much to all of you for your responses and information! A special thanks to Ryan, who summarizes most of the information and explains his choices. Very much appreciated by everyone!
I will very likely continue my construction in this direction, unless I find a reason and/or issues that justify changing direction. With the information you all provided, I better understand the risks.
For those asking why I need this configuration, here is the table that housed my Primo. On the right, a sloped ceiling. On the left, a door that can’t really be closed and a wall that prevents me from fitting long pieces into the box. The sides of the table can be removed for maintenance. Moving the table to another angle or position for each use is not an option due to the lack of space in front of the table. The box is required to minimize dust in the room as much as possible.
I guess another really easy way to say this for next time this comes up is a machine designed for rectangles 2:1, will never be symmetric, or they are inherently inefficiently designed.
Man being enclosed really limits you.
See if this will work, but i do not think u will have room!!!
I never considered that it is poorly designed!!! On the contrary, the machine you designed is incredible! I clearly understood that it is me who wants to use it differently, and it is up to me to adapt!!!
If I implied that it is poorly designed or if I offended you, I apologize! I tried to explain my questions, reasoning, and hypothesis as best as I could in a language that I do not master at all! ChatGPT has been my friend in helping me achieve my goals. And I must admit, I am not in a position to judge 100% the subtleties of the translations it provided, which I used. 
No not at all, I was just trying to summarize why it can not easily be both direction and still be an efficient design. You have made it very clear you like the design just by choosing to make it, even without repeatedly saying you like it.
No offense, I promise.
Excellent! I wanted to make sure I hadn’t offended you! I’m really glad that’s not the case!
Just throwing out ideas for helping you bootstrap.
One of my LR4 RC builds has a set of 3D printed temporary strut plates. 3plates front and 3 plates bottom. They’re sized such that they could just barely fit on my 300mm square TAZ 5 3D printer.
That beam is STOUT. It’ll eventually get a fully cut beam. Maybe. :-). The whole machine is stout.
An LR4 will fit in there, and it’ll be interesting to see how to optimize it for your use case.
As Ryan mentioned, the LR4 has designed in options for all the “don’t do that” stuff like flipping endstop homing directions or whatever.
That’ll be a really nice machine when you’ve got it put together.
How did you do dust collection with your previous MPCNC?
I agree with you, it’s an amazing machine! I will continue to build it as best as I can so that it fits into my box. I’ll see if I need to make any changes later. From what I understand, it should work well for my needs.
I made a version of this system so that it would work with the tool mount I had for my Bosch router. I never published it because it was very specific to adjustments I had made to the tool mount.
My hose came down from the ceiling of the box. This made it much easier for me to manage the hose.
do you have access to a laser ?
i cut mine out of mdf ,on my laser in 2 pieces
as couldn’t. be bothered pulling it all apart again
Little more spendy, but Send Cut Send is an option. I had my LR3 struts done by them. They were perfect.
For anyone considering doing this it is in breach of the license Ryan releases the files under.
@Dreyfus Are you saying having the struts cut by someone else is a breach? Anyone else? I know that you cannot have them done and sell the parts but for your own use?
You can have them cut by a friend for free, you can’t pay anyone to do it but @Jonathjon, who is a licensed reseller of LR4s and plates. 
You can’t make them to sell, which is what you’re asking a cutting service to do.
Okay, Same license for the LR3? I feel like I remember us all talking about using an outside service for some of this. Maybe I am getting crossed with the MP3DP V5 and those plates.
Please disregard my above advice concerning strut plates for the LR4.
@vicious1 if I need to pay a fine let me know on my LR3 struts…
Hmm, I didn’t think that applied to the strut plates since they’re a custom sized part and Ryan doesn’t sell them.
Ryan has never imposed any fines. 
I had my first plates cut as well in Germany when I didn’t know any better but have given back to the community and give a dollar on patreon every months. Also I bought the stuff from Ryan later on.
Might be, but I think it’s the same idea, isn’t it. Nobody knows but Ryan himself.
