Right now I'm good with this. I couldnt wouldnt be able to afford the competition. This was offered as an alternative that works. Though the recent testing showed that TMG needs work on certain guns I feel certain that this will be accomplished (lol I hope anyway). I consider my install a "permanent" one and dont really want to swap out heads, but if it's necessary I'll do it when I have the funds to do so. So lets get to business and get the problems solved for everyone involved. When this is accomplished everyone concerned will be happy.