IronCross; I just got mine finished last night. With the Magnum .91 in the front, as close to the firewall as the Great Planes .60 -1.20 motor mount would allow it to go, I had to put a 6 Volt, 1500 Nicad battery pack just in front of the two rear mounted tail servos to get it balanced at 90 mm from the leading edge. This makes it slightly nose heavy, but that is what several other posts recommended.

To recap, I am using a Magnum .91 four stroke, Futaba 3305 on rudder, and 3010 on the elevator, both mounted in the rear of the fuselage. Ailerons have 3004's, same with throttle, which is mounted in the rear most opening of the servo tray, next to the FMA Direct 8 channel receiver.

I opened up the covering on the bottom of the fuselage, toward the rear and installed a platform between the third and fourth formers from the rear and velcro'ed the 5 ounce battery pack to the platform. I recovered the the access area with white covering. If I need a little more tail weight, I will make a light ply or bulsa hatch. For now, it balances perfectly level at 90mm from the front leading edge.

I used thin foam under the tank, to keep the tank as low as possible, in line with the larger engine's inverted mounting condition. The motor mount is as high as possible to maintain design thrust line and angles.

I will try to take some pictures to post this week. Weather permitting, I will try to test fly it this weekend, then post a report for everyone.

Once again, thanks to everyone for sharing your information. Hope I can continue to contribute as well.

Now gotta get my quarter scale Dynaflite SD fininshed and report on that thread as well.

Happy landings to all

MikeBoyd