i just did it w/ my gp rapture. it wasnt easy but it want hard either.
my problem was the plane dieing on takeoff. if i could get it in the air it would be fine. but it would die/struggle on takeoff
so i raised the tank as high as i could (center line of the tank was a about1in lower than center line of the carb, now its about 1/4 of a inch lower)
took out my fuel filter and tried to make the line more direct.

what i had to do was take a long piece of fuel line and run it through the muffler and engine feed holes, out to the middle of the fues where i could plug the tank in. then i very carefully pulled the lines w/ the tank back into its origional position (from the muffler/engine ports).