Drilling piston for gas port mod
Rather than reserrect a many year old thread (
http://www.rcuniverse.com/forum/ys-e...ification.html) I thought I would ask if there is a current document on this procedure. I think there may have been some photos that are now deleted.
Thank You.
Ken
Last edited by kenh3497; 08-20-2015 at 06:50 PM.