Designed a clip, similar to the one found here:
https://www.prusaprinters.org/prints/20115-palette-2-tube-clip-holder-for-prusa-mini

Extended the shaft at the rubber bushing a bit, and added a piece to wrap around the Z threaded rod, and clip onto the lever of the extruder.

I was only getting 4 to 7 pings before, on the calibration key chain, using the other clips I've found or none at all, and this one gives me 8, consistently.