Okay, I have about a half dozen airplanes with inverted engines, some do and some don't. Each engine/tank combination has different requirements. I have had NO problems running OS FX series engines inverted, once the two needles are set correctly. I have had problems with the Voyager and an LA .46 combo. The plane flew great and was a terriffic first low wing plane. Someone recommended a .61 FX, definitely not, would not fit, way too big and heavy. A good BB .46 with a APC 12X4 prop will make it do everything you need done. If you are worried about starting, stand it on it's side, muffler down and flip it by hand with the igniter off, to make sure you don't have hydraulic lock from after run. The rest of the day, just start it normally. You usually don't have to prime it if you use an electric starter. I can hand start my UCD .46 and .60, GP GS 300s, Cermark Pitts, and World Models 3D 120 Fun Fly, once they have been run that day. They all have either OS or Super Tigre engines. The later has onboard glow, to keep it easy, simple and reliable in aggressive 3D flight.

Hope you enjoy your Voyager, it should get you started in to aerobatics with ease.