I drilled out my T handle, and tapped it for a brass pipe thread bushing (left over from oil press guage install), then drilled the bushing and re-tapped the right thread.. might work on that ball..
hope it helps
Hey 4SPD,... very sorry to have troubled you,..
I didn't know thumbwheels came with black buttons,, and was looking for chrome,, didn't see pix till today..
hope you find the trade you need..
... grant