The torx screws just didn't set well with me. Don't get me wrong, they did get the job done and the sleeves were a few thousandths longer, keeping the screws heads from scratching a finish when tightened.
Want to update this post about an upgrade to the Rare Breeds MR3 frt.
Datum Machine Works has a captured sleeve that replaces the rb's sleeves, allowing to use mil spec trigger group pins.
Super easy to push thru without the need to disassemble the drop-in cartridge.