OK, good news, I think. Potentially, presuming that the current design for RC3 carries over for final release, one can just, I think, barely squeeze out two LR4 XZ plates on a 200mm x 200mm aluminum plate.
It does not work this way:
But if you drill first, and then use screws to hold everything down, you can get them done this way:
The faint blue margin line is based on 1/8" bit (3.18mm).
@vicious1 Ryan, if this looks ‘OK’ then it means 200mm x 200mm can do. That’s a 7.874" square!
This is not going to work, you can see that the lines cross in the middle, so the first line is going to remove material from the second plate. You’d need to move them to the very edge on both sides, then the middle would be okay.
No, the bit will simply cross its own earlier path. A 1/8" would complete this cut without eating material from either plate. Look closely. 
To further illustrate that the cut could happen, I highlighted one bit path in yellow, and the other bit path in red:
Is your line drawing the outside of the cut or the center of the bit? If its the center then Phillipp is correct. And that’s what I took it as being as well. But if it is in fact the outside then you are correct Doug
Outside — when using a 1/8" bit. The post I made explained:
This was meaning the contour shown is 1/8" away from the plate. The space between that line and the plate is what the bit would remove.
Yeah you posted just a second or 2 before I did. 
Edit - NVM, the issue of center line vs cut path was discussed as I was typing
Does this mean that you aren’t factoring in a finishing pass? Not sure if that would matter, but it could add another .35 mm or more to each cut path
Oh, the rendering differs from Estlcam then, there it always shows you the middle of the line, doesn’t it?
There’s room to make more space between.
The bit doesn’t have to be accounted for near the edge here
the plates can separate some
That’s what I said. 
But Doug’s lines show differently from Estlcam’s somehow.
That threw me off as well. I just assumed it was the same as estlcam and the center of the bit.
Sorry, I missed that… I was distracted by your picture and just stopped reading before I got to the last line
Because of my stunning artistry, right? 
I checked and my placement does have enough room for a finishing pass, although the blue margin line did not factor one in. Here’s a screen shot that does show the finishing pass being at 0.35 mm.
Re. different from ESTLcam
yes, done in CorelDRAW and simply checking for 1/8" bit plus some to spare.
Absolutely. It could be done without the two plates being so close to each other.
My main reason for giving some margin of error there, is in case the orientation of the material does not exactly match the orientation of the machine’s axes.
Perfect! The 1/8” bit margin is necessary between pieces, but not on the boundary of the plate, usually I mill leaving 1-2 mm from the border, to minimize the material waste, so, it seems to be ok 200x200, also considering 50% trochoidal width
@vicious1 having just burnt up my makita router on the LR3 (from finding limits 
) Is there a better option coming for the LR4 or just order another Makita?
