Calling on guru engineering knowledge here...
A mate is on the home-stretch of a Velocette KSS resto. One of the cam followers has been stellited (welded) and the mate needs to have it ground. But there is very little clearance between the follower top edge at it's highest point and the cambox (OHC engine).
How thin could he have the stellite ground before it becomes a potential disaster (cracking up).
