I am installing these in lieu of hardening and threading the wing holding blocks. The insert package does not specify the size of drill to use, so I eye-balled it. The question I have is (and I realize this is subjective and hard to explain over email), but how much force should be required to screw these inserts in place?

I used epoxy around the inserts and screwed them in place, but somehow I felt that it didn't require a lot of force to do so, and I am afraid I may have drilled the holes a little too large. Any thoughts?