If you're going to be doing much hovering you should get a Cline regulator or Ironbay regulator. They completely do away with typical glow engine fuel draw problems. Your engine will love the constant fuel supply, no lean runs near the end of the tank. No loss of power when the tank is full from running rich. You will conserve a lot of fuel having a constant fuel draw. The advantages are many. I agree that large tubing and clunks, etc help but the only real solution is the fuel regulator. Pumps work ok when the tank is close to the engine but my experience is that the regulators work the best. Especially if you have a tank that's on the CG.