Wigglers

[Toolmaker51]

Yep, they can be fiddly. Mentor clued me in with depth mics, Jo blocks, and sometimes good magnets,
I use them rather often, when a pattern extends beyond axis of mill movement. Instead of losing travel indicating last hole, I tap for a button and dial it in after swinging or extending ram. The trick is a bent shim 'spring washer' under the hold-down screw. .010-.015 stainless is perfect.
Reminds me to post on tooling balls. Manner of projecting a position that way gives me a thrill.
I looked at your photo-bucket, wow...I ever get back home [Compton born, grew up in Lakewood/ Buena Park] I'd love tour of Garage Mahal.
Also need a clever more distinguished name for my 'cave'.