has anyone had a problem mounting a four stroke upside down on this plane? I have a magnum 52 that I want to put on this plane but the carb will still be lower that the tank stopper which i've read can cause a siphoning effect. Is this true? I dont want to mount this, cut my cowl up and then find it just keeps flooding. Im thinking of stealing the 46 la from my trainer and just using that and putting the 52fs on the trainer. The only other option I see from searching is filling the firewall holes and drilling my own.Would this screw up balance or flight tendancies of the plane any?

Thanks