Ok, I know I don't need another razor but I'm thinking of picking up a Tech. At the moment I own a '62 Slim (my favorite) a '55 Super Speed, a Krona, a Muehle R 89 and a Merkur HD. I'm thinking a 50's model Tech with a ball end handle. How well does a Tech shave and is there anything I need to look for as far as years go? Thanks!