Bill….. That is one immaculate and clever set up! Beautifully made, did you do that?
I’m far less organized. For the front, I’ve found that three small squares of 1/2” plywood under the rim give about the right relationship to the hub sitting on the bench. I’ve noticed that even the inexpensive set of spokes I buy from vintagecb750.com are so consistently made (to identical lengths) that I use that feature. After installing all the spokes, I wind them up by hand, so all the nipples line up with the end of the threaded shank. This gives me an “snug” fit. After I hang it in the truing stand (see picture a few posts back), I first put one extra turn on every nipple. Next I check/adjust for “hop”. Then side to side for runout. I used to set up a magnetic base and dial gauge, but more recently I’ve decided that when I see less than 1/8” gap, on the stick mounted to the stand, I’m done.