RE: Boomerang TORUS build thread
nickelup,
I'm flying mine with a Kingtech 170F as I had it lying around. With 4 batteries in the nose, I still had to add 700 gms of lead for it to balance.
A123 - 2 x 2300mAh packs
A123 - 1 x 4600mAh pack
Flight power 4350 mAh lipo pack for electron landing gear.
Despite all these batteries being right up in the nose, I had to add 700gms of lead. If you dont much care for the dead weight, i'm sure you could install a p180.
Besides the weight, I am using the original Sullivan tank which has a capacity of 3.7lts. I only get a flight time of 6 to 7 mins tops with the throttle at 50-60% power and a full throttle only for take off. You might want to consider that aspect as well.
All the best.