What a terrific thread! This is my first post to it, but I've read the entire thing now (and taken notes along the way).

I haven't started building my Mayhem yet (still planning out the build and finishing my previous project--a Goldberg Sukhoi). I have a new Magnum 1.20 4-Stroke set aside for it and I'm planning to move the rudder servo and battery into the tail after reading this thread. I'll still test the balance along the way, but with the 30oz+ Magnum, it sounds like I won't have much choice without adding lead.

Here's my question. I've noticed in several pictures that people have moved the fuel tank back over the wing/cg. I've never moved a tank from the suggestion position. Will the extra distance require a fuel pump or will I be ok just running the fuel lines from the tank to the engine as normal?

Thanks