close match to the od of the valve chamber. it will stay put..
you could add-- deform(slight cone shape) a thin steel washer to face the spring which will center the spring... raised center facing cup seal.
valve chamber needs reduced for best results.
a proper 12g. type of bolt will help...most 2k bolts were for LP and bored out to big
Last edited by Brassballs; 05-03-2016 at 05:09 PM.