Once you get over the learning curve of the set up, it's all down hill. There are several ways you can set it up to measure over bullet run out. The way I have it set up in the pic's below is how I prefer it, to measure my over all bullet run out.,,, When measuring over all bullet run out. I prefer that the bullet tip free floats, and not sitting in a cone or saddle when checking run out.,,, Ball bearing Blocks are nice on some of these Concentricity Gauges but for extreme accuracy you just can not beat the V-Blocks. Tip, The OOOO steel wool cleaning, "SPINNING" in the drill, makes your cases spin like butter. That means less noise, "CHATTER" on the dial gauge and a more clean and accurate reading.
The bottom pic is my set up for checking case neck run out, and some other cones and anvils. Tip, Be sure to deburr your flash wholes. If there is a burr, it will cause an erratic reading and the case will move back and forth on the V-BLOCKS. Tip, you have to really get your fingers use to spinning the case, and that's where you really have to practice your spinning of the case. If you get frustrated, the dial gauge will measure your hart beat also. LOL.
Also,, My Neco is the 50BMG model, It has a bigger carriage than the older style. My FIL has the older model, it has a smaller carriage and he had to order the second V-BLOCK. I hope this Helps in your set up, just look at the pics down below. If I can help, You know where to find me. Merry Christmas and Happy New Year.
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