I understand you are a sponsor, but you asked for an honest opinion. I was on your fb page just recently, and saw where you had comments like "here is another bird mounted that was dispatched with our device". I thought to myself at that time, (as a taxidermist), who would recommend a hole in a bird's head who also wanted the bird mounted? The head for me, is the last place I want another hole. Please understand that some people use the original head, and therefore do not separate the skull from the face. These guys make a relief cut that must be sewn up anyway, so your device may have very little impact on their method. However, the overwhelming majority of taxidermists use an artificial head, and must sew up those random pellet holes to hide those imperfections that a poorly sewn hole can often show. Do we have head shot birds? Of course, do we prefer them? Absolutely not. So like the waterfowler said, less holes is better.
I think your selling point to your key chain trinket should be geared more towards the meat hunter than the taxidermist. I have never tried your device, so please understand that I'm only giving you my opinion. I just cannot see a time I would use this tool instead of my current method which is compressing its chest with my knee. I would never be so brave or reckless to try that tool on a turkey.
I wish you the best of luck.