Motorman, Pit-viper, I rest my case about H-9 Syndrome. You have some very interesting points about the Saito 1.25 versus 1.0. At 4500 feet altitude here in Logan, a Saito 1.0 pulls the H-9 Mustang quite well [ little more than scale ] But I tend to wonder if the 1.25 may be just too much for the F-6 airframe. I too pulled that gummy glue off the firewall, and re-inforced with fiberglass cloth and resin with bits of round dowel all around it. [Standard corrective proceedure for H-9 products]. Any ideas where to find a more scale looking tailwheel. Any body besides me adding brass-tubes cut to shape for wing guns ?. MM