I haven't used the glow version but am running the almost identical diesel. It's a fabulous little engine - really nice handling and does about 17600 on an APC 7x3.
Robert, if you weren't aware of it, MP Jet have recently restarted production of these, after a break of about 10 years. So spares support shouldn't be a problem.
Steve
(Forgot to mention that mine was really tight and took a lot of running-in. Worth it though.)