Drop CTRL PE foam

Cross-linked PE foam for the Drop CTRL keyboard.  Works for both the low profile and high profile version, and for both v1 and v2 boards.   0.5mm thick   As always, we STRONGLY advise against using PE foam with 4mm plate foam and suggest you use 3mm plate foam instead (and have created variants of both the v1 and v2 plate and case foams to support this).   A special thanks to mcheddadi.  Without his research and contributions, we never would have been able to offer this product to the community.