I am flying a Shoestring with a Tower Hobbies .75/Slimline pitts turning an APC 12-8 @ 11,400. The plane flys like it is on rails. Has anyone actually flown both the Shoestring and the Little Toni, or Minnow. My Shoestring is only 7-1/2 lbs, were the Minnnow comesin about 8-1/2lbs.[X(] Will a .61 with pitts muffler fit inside the Cosmic Wind cowling, or do you have to cut clearance holes.