I’ve seen in pictures, a sort-of “shaft” on dials of optics. my guess is it’s for speed in changing zoom, but i don’t know what it’s called, or where to find info.
Pic for reference…well, that sucks, i can’t even find a pic of what im looking for!
Someone out the in the internets should know…
They are called ‘cat tails’. Check here for your optic - http://www.3gunstuff.com/
I’ve been meaning to get one for my S&B but other things seem to chew up the $$ before I get to it.
cat tail is what you’re after.
Thank you. Thank you. Thank you. 
You can order directly from Charles Drissel or from 3gunstuff.com who sells them.
A great product.