I have two of my fathers GEM razors. I tried one razor with some GEM blades I had for a paint scraper. I got a very close shave with only one weeper. I want to put the razors into my roation, however I only have two of the old blades left. I went onto the Ted Pella website and think the correct blade I need to order is the, SE PTFE-coated blade Product #121-3, 200 blades for $34.85. Experienced GEM users: Is that the right blade? Thanks, Doug Rosso