I totally agree. I just went through the same thing as you with my Moki 2.10. The perry pump simply did not work with a tank 20 inches back on mt DPM Edge 27%. I used the Cline and it works flawlessly. I would keep the tank on CG and try the Cline or Ironbay fuel regulator. Make sure to use a good filter (Dubro) before the regulator and it will be very reliable. The plane will fly much better with the tank on the CG since the CG is the same for entire flight. With the tank in the nose it will be very nose heavy for the beginning of the flight and be perfect only when you are ready to land. Also the engine will run with the same exact mixture the entire flight instead of leaning out as the tank gets empty. You will use less fuel as well. That is a fact.