..for those mods, that's a a good return and I'd proably stop there..esp. as you seem to be in a 12 foot pound limted area. Only suggestion might be if yu start having point of impact changes...that muzzle attachement is proably pretty heavy, and that barrel band might shift a bit from the weight and vibration...might not...but if you do have problems, might consider a ligher weight muzzle attachement.
These things have the widest variation in stock wood!...yours turned out quite well. Always seems to be at least one spot that they had to fill with some synthetic stuff...usually long cracks, but in yours it seems they had a "bullseye".