My solution is pretty low tech. Using a magnetospeed setup similar to the one built by Mule Deer and using a rifle rear bag and front rest similar to Dirtfarmer, I simply place a 2' x 6' finished particle board shelf on top of the shooting bench at the range, set my individual pieces on the shelf, align as necessary and shoot. Simple and does not require any modifications to store bought stuff other than the one hole in the rock rest jr to hold the magnetospeed unit. Can easily be adjusted for different rifles and the weight of the rifle, rests, bags and caldwell unit hold the shelf in place while shooting. And the shelf only cost about $15 at a local builders supply store.
