Modify Tech Torus Reinforced Aluminum Version 3 8mm Gearbox Shell for AK/G36 Airsoft AEG Rifle

"Neutral review here. I want to like it but it's making that hard.

Pros:
-Solid reinforced construction, well built for higher power rifles.
-Cutouts for lightening also make for easier maintenance and heat dispersion
Cons:
-Tolerances are off. I can't engage my motor cage without machining, and I had to take off some material so my cutoff lever was not binding. Cutoff lever holes were too small for the pin.
-Not all screw holes were tapped. Most importantly the hole for the exceedingly small screw that holds the trigger, which was also undersized. I ended up stripping off the head of the screw I was trying to use to cut the threads as finding a tap that small is challenging at best.