No one has the experience that you do. No one has made the investment in the equipment that you have. The tuners of the week can make their silly claims on the forums, but the performance of their rifles won't last because they don't fix the underlying problem - the receiver tube! Hell, I don't think anybody else even makes their own parts - just drop JM's parts in with some new lube and call it the latest, greatest, best-ever tune.
In any case, not to suck up too much, but your dedication, innovation and craftsmanship are appreciated!