Well-fabricated and I like the large dia. tube for the external rod. The clamp and chamber spud support is also interesting altho not reversible because of choke dimensions and thinwall at muzzles which leads to the cantilever from table kludge. That looks good enuf also except no easy rotational axis of barrel manipulation.
I do have one little gravitational quibble with the setup. Calibrate indy plunger and anvil horizontal; that's fine as both rods experience deflection. However, put the rig in use and the barrel wall intervenes between the anvil (inside) and the indy rod outside. I'm not certain of the magnitude of effect on the readout of the relatively-rigid large dia "tubing" (barrel) intervening normal to the operation of gravity but there is some effect. I'll stick to Clymer or Manson suspended vertically and barrels manipulated by hand but the design features and care taken to build this modified Manson are impressive.
jack
