Hey all, I'm a long time Glock owner but first time with a 10mm. Just picked up a 29SF and have a few questions to get me rolling. I can hunt with a 4 inch barrel in Colorado. Can I just use a barrel from a G20? I've seen some threads on converting to a 40 cal. Has anybody done this without hiccup? Is it just a mag change and conversion barrel? Lastly - I'm looking for a leather thumb-break type holster - and am not having great luck on finding one for the 29. Suggestions would be greatly appreciated! Thanks!