This is another G3YUH fun key :) I love making fun keys although as always I'm looking towards a serious action, this is a medium sized key with the classic 80 series dimensions and design but using up a few brass oddments and some odd sized bearings left over from previous projects, it is a series of cut brass disks the two outer ones being the bearing holders with machined  tighteners, the contact post is a slotted disk that acts as a crush bar for the gap adjustment and thumb wheel spring tensioner, the turnkey to tighten the crush bar could be just a 4ba screw as it is not often used but I like to be able to adjust everything fairly easily, for a medium sized key it has an excellent lightweight crisp action, the magic 80 series design works as well with these smaller keys as it does with the bigger heavier ones, and the plating suits it, I'm very pleased with the result.