I have been flying one for a couple of years now in local pattern contests, with an OS .61SF. Pretty much ballistic at 6.75 lb with trike retracts. You will need to be very careful about the weight of anything you put in the nose, mine is carrying lead in the tail with the battery (1100 mah nicads) placed over the wing trailing edge. IMHO, and I fly both, the Atlas is a better pattern aircraft than the Curare, for the pattern it was designed for. Plans I used were from RCM&E (now Magicalia) and it is an all wood (no foam) model.
Evan, W.B.#12