It is so easy once you find the correct part. In this case all that was needed is an extra long nut. I just didn’t know where to get them until I went in to a local Sacramento store called Blue Collar Supply. Right there by the front door were these 1 3/4”x1/2”x13 hex nuts. Yowser. And they work great. And while I was in the big orange box store looking for some angle iron to beaf up the vacuum arm support, there, right next to the threaded rod, was a display of oversized long hex nuts. I guess you just have to know what’s available and/or where to look. This solution is solid as a rock and can easily support very fine adjustments. Problem solved.
-- tim hill www.newcalshop.com