I'm digging into the first Zoomatic I've had since about 1970.
It's actually a pretty cool strainer because tensioning the snares does not also pull them into the head (much).
The problem is the damn knob. I guess this is pretty common where they get stripped out. Mine was delivered with no knob, but i can see how it would be pretty easy to strip out the splines.
My plan is to find a stripped out knob, and then silver solder it onto the shaft so it will never come off. It will all need replating afterward but it should be pretty bullet proof.
Questions are:
What do others do to repair these?
Where did all the stripped out knobs go? (I have a post on the WTB board but no takers)
Thanks!