Greetings Matt,
I am new to leather craft as well. Looks good to me the untrained eye. Something I have been taught was to drop the leather piece to be worked into container of water of some type, let it soak until all the bubbles stop coming out of the leather, this is one way to ensure the leather is "wet" through and through. Take it out afterwards, place it on a non linen towel of paper towels, lightly dab off the excess water, wait a few till the leather is cool to the touch, get you a little spray bottle that mists water, and keep the leather "wet" or workable with the mistre while you are forming. I will post a pic on a new thread of my first knife sheath I finsiehd this week. Not much to look at but I am begining this as well. I really like your holster style, mind if I try a go on my G30? Keep it up!