Ah just gotta say that I got one of my most comfortable shaves ever just now. I used a fresh Gillette Yellow , a blade I hadn’t had or used for awhile in my ‘62 Tech and it cut through my day and a half stubble effortlessly. The soap was Proraso Green a new favorite . These 7 o’clock Sharp Edge blades work well in Techs. I am quite pleased to say the least! BBS is great when it’s comfy. Glad I bought more of these blades. Any Yellow fans here?