How tight to set solid lifters

Dale Davies said
I have done it many times. The wrench jumps around a bit but no problem. Trouble is that eventually the feeler gauge gets hammered a bit thinner.

Again, maybe on some dead stock junk with frictions locks maybe.

But any performance cam with jam nuts it ain’t happening. You’ll be so far off it’s not funny.

And yet, no one has said why or how trying to lash the valves with an engine running is even close to better or accurate. It’s not.