Richard, I'm a late comer to converting engines. The conversion of Glow engines seems to be one not often tried but some reports are very positive. For me, I would like to know about the spray bar because one conversion is using the stock carb but fine tuning it for gas. The WZ Walbro carbs are a lot like the stock glow fuel carbs only with a pump and regulator (plus items in the equation) but with a really nasty throttle arm setup with doesn't lend it's self to a servo operating it (Real Negative in the equation).That carb is the one that has the spray bar slit at 90 to the venturi.

Also, Ialways like to know if "conventional wisdom" is correct or not.

Don