Willow
Sounds like you are having fun with the Willow. I got tired of waiting for the replacement tail wheel bracket and I put my Saito 150 in a DPM Ultimate Bipe. I won't do anything with the Willow until this winter when, hopefully, I'll get a Saito 120 for Christmas.
Would you take a picture of how you have the exhaust exit the bottom of the plane?
I'm excited about this plane, thanks to your posts, but I don't feel like building them this time of year.
Thanks!