Have a SuperTigre Bluehead 60 in mine. Plenty of room under the cowl for larger
engines and the Venus needs something larger than a 40. The only problem
with the Venus is locating the centerline of the tank with the carb centerline on
the inverted engine. Did a little surgery on mine and put a Tettra 12 oz in it. The
Tettra tank has a fairly small circumference for a 12 oz tank, just a little longer
than the tank that came with the airplane, so a fairly easy modification. Only took
8 grams of weight on the tailwheel mount to balance with the 60.
If you locate the tank where the hole is already in the firewall the carb will be well
below the tank and fuel will siphon into the engine while just sitting. Not good with
an inverted engine. Hydro lock!!

tommy s