Any votes for the magnetospeed?
I like them, but for me, the biggest advantage with the MS is shooting on a public range. You don’t have to inconvenience other shooters to get set up. Or tear down either. I use packing tape wrapped around the MS and the barrel to prevent it from moving.
To expedite set up with the Pro Chrono, I get the rifle aligned to the target and use a length of Jute attached to the front rest. I extend the Jute parallel to the barrel, and set up the PC. It cuts down on the back and forth you see others doing with their set up.