ORIGINAL: Jeff Boyd 2
Personally, I would cut it in the middle giving you equal area on both sides to run doublers or stringers. Also keeps the integrity of the firewall intact, and easier to line up the "two halves" of the motor box to keep all the thrust angles the same. If you use triangle balsa stock in the corners, it almost does this by itself.
We have used motorcalc a lot . . very helpful with getting everything close. Nothing is the same as actually flying it and playing with props / batteries, etc . .
I like that idea and I see what you mean with the corner stock, you in essence use the corner stock to re-join it all back together which also assures it is lined up, hmmm. Looking at the design, I am tempted to remove the top and bottom which would allow me to remove the firewall and simply cut new keys to hold it as it is held in place now, this might prove more work though considering your approach.
As to the sevo issue, wow, good call! I wouldn't have even though to look at that. You'll see there is about 3/16" gap from the servo flange to the wood, about the same size as the rubber grommet though I think I'll add a popsickle stick of wood to ensure there is room to compress the rubber grommet a bit. Luckily the top side of the wing has a layer of ply between the bottom of the servo and covering so a tight fit still won't cause a bulge to be seen. the deeper end of the servo bay is fine, you can see the flange even sits on the wood...
Jack