I like everything about the PST except it's so weak on elevation travel, that is why we've used the Sightron for the LR 338's. If the Sightron had a simple zero stop and the windage counted up in both directions the PST wouldn't have anything over it.
Dig the Norma, I've been trying to get one built for two years now but I got side tracked with a couple 338 RUM projects.
You may consider selling your bolt and getting a complete bolt from PTG with all the goodies already on it ready to rock and roll.
Brux barrels have been treating my well, I would consider going to a heftier barrel than a #4, makes thing easier and better all around.
If you got a similar stock but with a higher comb you wouldn't need the adjustable check piece, at most maybe a check pad, saves money and weight.
I would trade a DBM for a better trigger.
The only thing missing is a rail, rings and recoil lug.
The parts I'm gathering are a Raptor action with lug, rail and Jewel trigger, Brux med palma 28in plus Muscle brake, Manners T5 stock, Nightforce direct mount rings holding a Nightforce 5.5-22x50. This is what I'm working on for my elk wackn rig for 1000+ yards, just thinking about it makes me happy