My suggestion regarding Gas experience was based on your buying the Mentor-G with the gas engine. Tuning is a bit different, starting is a bit different, plumbing is a bit different. Glow engines do not require as much break-in as gas, and I find simpler to tune. That's just my experience. There is a great thread here on RCU regarding gas engines for newbies that I've read through several time, and printed for further reference.

Good luck.