I am wondering what is my best bet for getting a vacuum chuck setup on my new lathe. I have an older oneway rotary adapter that I would like to reuse. The problem is from looking at the parts diagram that side of the spindle is not threaded and even if it was the handle seems to help hold things together unlike my old Jet 1442. I have a 3/4 left handed threaded adapter already in the oneway rotary adapter. Wondering if it makes sense to try and buy 3/4 left hand tap to thread the existing handle and then find a short nipple to hook the two together. Or should I just try and sell the adapter and buy one of the through vacuum adapters that a few vendors seem to make. Thanks!