I have been nailing down my ICRPGified system. I wanted to easily use my OSR/5e stuff I’ve accumulated while making things ICRPG simple and fast. I kept d8 HD for all monsters and varied weapon damage, but otherwise things should translate simply into most d20/ICRPG style games.
II can just open up any OSR/5e monster block and use it on the fly, but I also like to make my own sometimes. They are all formatted to fit on a 4x6 index card. 'm just sharing because I know I like seeing what others brew up. Someday soon I’ll share my little 2 page rules set.