Interesting, I didn't know you could use other blades. I agree, the Gems are pretty sweet. I use one in a 1912 Gem Jr. that I paid $10 for and get as good a shave as I have with anything else. You aren't the only one to say you are getting the best shaves of any other system with the oneblade so good on you. Do you feel you are missing out on shave quality not throwing out a blade after every shave? At $.14 a blade, it wouldn't be nearly as weird as the $1 you would pay for the Feathers.
Well I guess I stand corrected as I was not aware that there was a substitute blade. It's great that you've found an alternate blade to help defray the cost of O-Blade ownership. However I do stand by these facts. Each O-Blade (blade) does cost around a buck and the company does recommend (and we know why) that you use the blade only once. So my main point is the cost of the priority blade not the quality of the razor.