I bought an M5 PTG dbm from Mile High a few years back.
Required work to get it to fit, but when I finished it worked flawlessly.
Your easy button is to send the rifle to Jeff Allen at CDI Precision in Florida and he will inlet your stock and install his dbm for a little over $200.
Maybe I can get him to give it a good once over at the same time. Install that TT, plus whatever. Not that I think it really needs much but hey...spend once and no crying later.