I'd have to say that'd put me in the curious, but not at all interested camp.
I don't have accuracy problems with the KAPEX or it's companion "smart bevel" .. still not getting any hints here on why yours is supposedly better. To me you're looking at a pretty small market if your total potential is those that own a KAPEX, that are also disappointed and are further inclined to consider something in proto form.
(not being negative, just trying to be constructive)
"Throw your Kapex transfer device away" is not something I'll be doing. It's useful with the KAPEX and on it's own. Further, it's accuracy is directly related to how well you use it.
On a general note, rubbishing something and saying yours is better without even having an example to show wouldn't typically get a lot of miles with people I know. Your familiars may be different ...
Also, as [member=44099]Cheese[/member] says, there's absolutely nothing wrong with a good T-bevel gauge.