This foam fits the T-Stak cases perfectly however the pluck foam can be difficult to customize especially if you have lots of round corners or require different depths
The top three layers of the foam are pre-cut into squares to allow you to pluck them out. That works fine however if you cut a curve then you are dealing with a half cut cube which eventually falls out so your nice curve becomes a square.
This foam insert is better than nothing but at $20 an insert it's expensive and not as durable as I'd like. I order Kazien inserts for the rest of my boxes.