Hi,
I have one with a Moki 1.8 in it and it is awesome.Hovers @ 1/2 throttle,powers right out!!Also,I did not have to add any weight to balance the a/c.I'm running a sullivan 24 oz tank,which onl required trimming the sides of the bulkhead.I mounted it inverted w/Bisso inv. muffler to keep a clean look.Theae engines run great
inverted.Good luck!!!

Erik