Mario,
Sounds like you sell these or have some kind of vested interest. I was at Woodcraft recently looking at different things, among them, Sharpening systems. Lot's of them out there. I really didn't see anything that would work for straight razors.
They didn't have, or I didn't see the EP Apex system. I haven't used the EP system, but I'd have to go with Lynn's findings. I would like some kind of setup for my knives.