Yes... permanently bedded into the stock.
Yes, lugs are cheap. Accuracy isn't....
I like my actions in the stocks tight. If it wiggles, it's going to shoot like chit. Check out these pics where I painted the bedding to match the stock. I've shot 200 rounds down this Sako and the paint hasn't even thought about marring. That tells me it's pretty solid. A good foundation to build accuracy off of:
^^^This Sako A7 is freefloated from the factory, but I put a small pad in front of the chamber because it's a pretty heavy barrel. ^^^ I do the same thing with the CTR and Superlite. The proof that it works is in the targets that I post...
Now, for the speed bumps on the superlite, here's a pic of how I dremmeled them out of the way. Barrel freefloats great now:
Like Formid said, if it's not adequately freefloating, when you apply pressure to the stock via sling or bi-pod, that will shift your POI. The main reason I freefloat my rifles. I don't like POI shift of any kind...
My CTR didn't have speed bumps, it was freefloated from the factory, but you can see how I glassed the recoil lug into the stock. Everything is solid like fort knox. That's the best guarantee you'll have a good consistent shooting rifle:
Yes, I fill in those voids too. It stiffens up the stock. I use quick steel in there and then glass bed with Devcon steel...