I was considering it myself then I read in the Sig forum about member literaltrance saying that he was having FTE's with the 9mm conversion in his Glock. Seemed the ejector was not picking up the cartridge????
May have to do some more checking but me I'm going to wait. I have the Sig P229 that I converted from 40 S&W to 9mm with no problems using a Barsto drop in barrel.