In order to put more information in the Interactive Guide to SE Razor Shaving, I would like to know if someone has refilled one of those? The one I have is transparent which I love as I can clearly see where I'm at. There's a piece of metal bend in half pushing on the blades so they go up. I did not figure out how to open it yet as I suspect that the door is glued in. Anyone had success refilling one of those?