D
Deleted member 16735
⚠️ New Member | No Deposits ☢️
- Messages
- 1,863
I'm sure they are properly rated as they are pretty popular. However I did find the patent for the original double stack, polymer, modular double stack frame, filed in 1992. Interesting that this design was relatively obscure until only a few years ago. It's a neat read (don't worry there's pictures):
Last edited: