D.O.A.F.S. Are you needing info on an on board glow with its own on board battery or just the remote glow that you use your normal glow heater on? Four strokes run fine inverted without an on-board-glow system. The battery is just something else that needs charged.
I use the sullivan brand remote glow and hide the connector and it works fine without a lot of added weight.
http://www2.towerhobbies.com/cgi-bin...?&I=LXBC35&P=0
Fred