FWLIW (and absolutely against common sense to share, but what the hey? It's the truth.):
Last spring I dreamt up an idea for mounting a Dremel tool and grinding stones on a guide and started looking into it and found the Edgetune tool, and was impressed enough to contact the inventor/manufacturer to see about obtaining a sample and offering it as an edge tool alternative. (As an option in between hand tuning and the higher grade edge grinder we were offering.) It simply made more economic sense for him to sell directly than through us or others.
I can relate, especially regarding our spray waxes and establishing brand identity, and competing against old school thinking/conventional wisdom and brand loyalty: "<...the Edgetune tool is for> the racing coaches...which is currently our biggest market w/direct on-line sales. The product has outstanding customer acceptance and professional consumer packaging (also a great point-of-purchase appeal)...but so far it is a "best kept secret" w/ limited on-line only sales."
If base grinding is not a case hardening concern, why is this, in skilled or semi-skilled DIYer, hands?
As a design professional, I'd be a total hypocrite for not allowing the Edgetune the benefit of the doubt and worth a real look. Like T4B & SW, we believe....no.... we know we have very good products. The problem lies in getting others to 'get it' without out the flash and deep marketing pockets and expertise. I say give Edgetune a real and objective shot (maybe on your best buddies boards first