How to make checks in the recoil lug area? Dark arts question.

[Bear43]

If you do assemble the rifle and there is a gap between the sear lugs and the draws of the wood then the fore-end will be reduced to matchsticks in short order. I did an improper fitment once (my first attempt) and destroyed the fore-end in less than 10 rounds. If you fit the fore-end nice and tight (I use a rubber mallet to tap it into place) then the metal compresses the wood at the contact points and leaves witness marks on the wood. Just go by those witness marks in the draws, that will tell you if the initial fitment is evenly snug and bearing the same. That is what I go by in that area anyway.