Piston question

My old homemade ring filing fixture. I made this several years ago from a couple of extra parallels from my seat and guide machine. View attachment 1715590294

You measure your gap and figure how much you need to file and use 2 feeler gauges to set the small plate that you butt your ring against. Make sure the ring is square against the plate, and tighten the parallels to hold the ring.
then remove the small plate and file the ring until it is flush. This saves me a lot of time since you don't have to file and check over and over to get the right gap. File once check and done.View attachment 1715590295 View attachment 1715590296 View attachment 1715590297 View attachment 1715590298 View attachment 1715590299

The parallels are doweled together. I have to true the filing surface on the belt sander after about 4 or 5 sets of rings.
I registered a while back but haven't posted on here (apart from an intro) but I would like to say thanks for that idea. I made a jig up like Mopar Sam's and it made filing my KB rings a pleasure! Thanks Mopar Sam:thankyou: