I currently have MPCNC and think that I want to go to LR4.
But what is the real difference between them. I would like to have full sheet capability.
I am open to suggestion,
thank you
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After seeing a few demonstrations of the LR4 I honestly wouldn’t bother with the LR3, price wise I don’t think there will be much difference in the end, the stainless pipe is a larger diameter and some of the parts on the LR4 look a fair bit larger and looks like it’s gonna use more filament than the LR3, iv heard the LR4 is easier to assemble and disassemble. It can cut over twice the speed and double the depth. I have almost finished my LR3 build and will be upgrading as soon as possible
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In my opinion, having built the LR2, LR3, and now the LR4, they each make major improvements on the previous versions, in rigidity, ease of building, and countless other things. (The instructions aren’t quite 100% done for the LR4, but by the time you print the parts and get the hardware, they will be. As of now, they are close enough to get a fully working machine.) Unless you have some very specific reason for the LR3 (I don’t think you can get the aluminum ZX plates any more from v1e) I would almost certainly think you’d want the LR4.
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LR4 100%. The LR3 was great, but the 4 adds so much stability. It’s a whole other level and I really know what I am talking about because I have always pushed the machines pretty hard. 
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Ok, LR4 it is
thanks
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As the other have said LR4. I had the LR3 kit, but 4 was out before I built it, so bought the LR4 upgrade. Just makes sense to build the best at the time.
If you had already started to build the LR3 maybe it wouldn’t be worth upgrading, many happy LR3 user are still happy and not planning an uograde just for the sake of an upgrade.
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I enjoy the lr4 way more so far over my mpcnc. I love the open front! Makes things so much easier!
This was intriguing also!!!
Really was enticing, if you want a solid small machine!!! I really wish my mind was more creative!
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Built a Primo, LR2, LR3, and LR4.
If I had to have just one, the LR4 would win.
The Primo is very nice and I really like jts stability, but it has a restricted size.
The LR2 had the size, and that was about it. It was harder to use, hold-down options were limited… and it’s well and truely obsolete now.
The LR3 is fun, it’s much easier to use and very capable, but from a new build perspective, unless you have a need that the LR4 doesn’t have a mod for, and the LR3 does, there is little reason to start one. I still have a greater Z height on my LR3 than the LR4, and there are a few other things that make it nice to have, a few more control box options, (I’m working out a Duet 2 box for the LR4 now.) The one and only think where the LR3 has an advantage is the printed XZ plates. These can be printed if you live somewhere that shipping is super prohibitive. The LR4 spec is for metal XZ plates, and these can only be sourced from V1 by license. While a third party service can possibly cut them for you, it is against the license for them to do so for money, and … they are going to want money…
The LR4 is a beast, relatively speaking.
Okay, it’s not going to compete (well) with some machines with costs orders of magnitude higher, but bang for the buck, I think the LR4 has it hands down.
For the XZ plate issue, I have 3D printed XZ plates, and I used the plastic plates to mill them from harder material, and then milled aluminum to make a (now obsolete) beta set. For my release model, I’m still on the melamine/MDF stage. While I think at this point I could probably mill the aluminum, I just used a part of my Christmas bonus to buy a set from the V1 store. This way, I will get a known good set, without the possibility of wrecking more aluminum plate.
I can then use my remaining stuff to dial the machine in and figure out what it can really do.
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I also have built LR2, LR3, and LR4, and agree they keep getting better with each version, and since the cost for LR4 is not any significant change or increase over LR3, no reason not to go with LR4.
So I haven’t had the chance to finish building my LR4, but logically thinking, LR4 would be the way to go. I don’t see a lesser version being released after a stronger version. But others have said, pricing is around the same but seems to add some great stability and rigidness.