No. NT does not mean two-gap. Our NTs do not control the center and flow, they have a gap like everyone else. Note that they're not head up, either.
And no, 3 tech and 5 tech are not two gap necessarily either. We are a one gap team.
As for the other posts about Edwards, he's pretty big compared to where he was coming out - 293 (and a somewhat impressive 4.83 40). But he wasn't really that explosive, so he gained weight I'm assuming to become more solid at the point of attack. He wasn't that good a fit in Crennel's two-gap 3-4 but he was solid for them in 2010.
I can't tell you exactly what McDermott will run this year and last year was a disaster. He will primarily run a 1 gap scheme using the 4-3 but could opt for 1 gap or 2 gap or a hybrid combination when they go to a 3-4 scheme. But I do know under Fox especially when we had Kemo, he was responsible for both A gaps on run plays . He lined up on the outside shoulder of the center but not in the gap which is still defined as the 0 technique. He had a 1 gap assignment on pass rush assignments but was usually replaced for someone who could actually get penetration. I already said that in a 3 and 5 technique it is by definition a 1 gap assignment. If it were a 2 gap assignment, for example, the DEs would be lined up over the tackle in a 4 technique.