I've heard that Todd Watts is now doing the defarbs for the Regt QM... not sure on that though.
Todd Watts, is par excellance, a real good gent and a superb craftsman.
That said Lodgewood's defarb of the P53 is about the best.
Zimmerman does excellent work as well... and he does subpar work depending upon his mood and the time of day I think. That said his excellent work really is outstanding. I will never purchase anything of his w/out first handling the finished product.