My main objection to the ADL setup is dealing with the middle screw, and if you use the stamped 721 long action, or 722 short action bottom metal, they are drilled for the middle screw. The stampings are cheesy looking to me, and don't fit the BDL inlet very well, but are easier than filling the stock, and you still have a repeater. I think you have to use an ADL mag box also. It's taller than the BDL box.
Good luck, Tom