I have two Techs. One is my dad's old alu handle travel size Tech from the sixties, which is ridiculously mild, even when the head is transplanted to my Weber handle. That put me off Tech until I got an old beat up Tech as part of a lot on an auction site. That one shaves much better, and made me understand just how good a shaver Tech can be.
I hear the earlier models are supposed to be a bit more aggressive. I probably should pick one up just to compare at some point.