Personally I would stick with the Tech. In my experience it's impossible to cause irritation (trust me, I actually did try). So the question now is which blades are you using and can you feel the blade when you shave?
I'd also stick with the Tech until he works through all the other options. But I personally can't get a BBS from a Tech without getting irritation because it's so mild. So if I want a close shave from a Tech, I have to blade buff like mad, add passes, etc. and that gives me irritation from all that extra action. Or I can get a comfortable shave with no irritation, but not a very close one. And this sounds pretty similar to what OP is describing. It's very possible that I'm not that good at shaving, but going more aggressive is an easy cheat for me.