Shadow trooper chest armor

[Dadofsix]

How much can I trim this bottom area?  I’ve gained some weight during The Rona and I’m worried this won’t fit unless I take it back a bit.  

[IcyTrooper[CMD-DL]]

You can take a bunch of that off, there is no requirement for a return edge at basic level approval. If you are going to for Specialist (L2 with detachment) then I'd plan on leaving only 3/8" (10mm) around all edges. Personally, I'd even leave 3/8" (10mm) for basic as it adds a level of depth to the armor.