Interesting. I own a 56" top and bottom and a 44" bottom and feel that the 56" has a slightly better fit & finish, plus it has actual latches on the drawers while the 44" has detents instead. I much prefer the 56" over the 44" Having said that, I bought mine a handful of years ago and am...
At the Elkhart RV Open House two years ago, there was a higher-end 5th wheel unit where its front cap had caught slightly on fire due to the cheap LED strips being cut to length and not being re-sealed...
RV's are generally built rather haphazardly.
I'm also a SolidWorks user, and to do it properly would take many, many hours. You would need to reverse engineer the drawer lock system and the slides, and you would still need to figure out the initial design of the box, drawer gaps, metal thickness and other fabrication considerations. Then...
I had to have nine stitches in my left thumb Sunday night for slipping with an exacto knife. If this is the dumbest thing you've done in awhile, then you're doing pretty damn good.