"Mike in Mystic" writes:
Get the woodpecker Precision Router Lift. It is rock solid and accurate. I
have the 32 pitch version and it makes height adjustments to the tune of
0.001" easily and repeatably. Also, it has two guide rods so it won't rack.
I have a heavy PC 7518 router beast in it, and it hasn't sagged at all.

I've got the same setup and agree completely. I use a dial indicator
to zero out the bits, then I can set the height very accurately just
by counting cranks and watching the thou indicators.

Mine is paired with an Incra fence system, which has similar accuracy.

No, I don't use a drill either. Even at 32tpi, it doesn't take *that*
long to change the height, and with a crank I can count turns and keep
track of the bit height.