First off I'm not an RC engine expert but I'm mechanicaly inclined. I would use a air filter on your engine. Anything that goes in the carb goes right into the bearings and engine. If you hit the nose hard on the dirt it will help keep objects out of the engine. If you fly through a swarm of bugs they could get injested to. If you land in grass, grass seeds will be flying everywhere. It gives me piece of mind that nothing will accidentaly fall in the carb also. A Bru Line Air Cleaner is what I use. I think using a fuel filter on a new tank can't hurt. Might be some flashing or something else still in the tank. After that it should be a closed system.