Curious, how do YOU check valve guides with the "wiggle" test?

Syleng1 said
I fully agree with Moper; part of properly redoing a head IS new guides. Years ago when I was Dealer ship wrench we would send heads out to be knurled to save $ and slow oil burning on used cars.
Now a days with Viton seals and bronze guides; you can have a tight valve shaft tolerances and valve seals that last! I like bringing iron heads to the machine shop- for an older auto machinist, these old Chrysler heads are a walk down memory lane. I've even asked them if they had any old Chrysler heads and have come home with more than one set of good heads cheap (beer money!) Ya just gotta ask.

Agree w/ the last two posts. My head guy is an 18 time national record holder, and lifelong friend. Does heads for himself and customers. He can wiggle a valve and tell weather it needs guides or not, I can too now, no secret to it. He uses a new bronze screw in quide that has to be reamed to fit, and comes out precise, and lasts very well/ they are usually tighter than what is mentioned here, and no taper to them. Machine work of any kind is only as good as the guy doing it.