So my carcass has been done for a while but it's a side project as I don't have the time to fully dedicate to it. I made the legs out of 2x4 but I'm not to happy with them. I also built the carcass out of Mdf and I don't think it will be able to handle the drawers or constant moving to and fro. Also the T-track from peachtree is a little to thick so i'll most likely redo the top frame and use 3/4 all around. Here's what I've built so far.
Looks nice to me, i wouldn't worry about mdf not holding the drawers. I didn't use it because of the weight, but it is more resistant than you initially think.
Sometimes i trash damaged or surplus MDF carcass type assemblies which are just nailed and glued together, and often smashing them on the concrete doesn't do any damage. I need to take out a hammer.
Good luck with the continuation!
TS55R, CT22E, CTLmini, CTL MIDI, CTM 36 AC HD, Kapex KS120, ETS125, ETS150/5, RO150, RO90, CXS-set, T-15+3 set, DTS400, OF900, OF1010, OF2200 set, Carvex PS420 EBQ set, EHL 65, SSU 200, Centrotec installer set, LR32-sys, FS-800, FS-LR-1400x2, domino 500+domino sys, domino 700 XL, Surfix-sys, Sys-box 1, Syslite, LEV-350, Sys-box,MFTB/1-2-4... MFTC