Thanks for all the advice! I started from scratch and re-machined the adapter with a timing ring. It's about 7mm shorter.I'm just waiting for some parts for my milling machine before I finish the front. I also made a hall sensor mount out of aluminum. I'll post some pictures later this week when it's done (post-office willing).

I'm with you on the mounting screws. I just finger-tightened the nuts for the photos. Iactually filed the rail slots a litle bigger to accept 5mm capscrews and mounting will be solid...

I bought the short block new at Farmer's Exchange. Model 1055 I believe.
</p>