Indeed welcome Yoshi to the site and welcome to the passion. Beware the passion can become a lifetime passion!

Nice job on your trainer mods. I am curious though it appears that you extended a rod from the rudder axis down through to the tailwheel axis, I must be missing something how can that work through the 25 degrees or so between the two axis.

Just a though if you really want to make it a great flyer don,t just flatten the wing as you said you intended but go all the way to the neutral roll axis and droop the wing about the three inchs at the tips or roughly the same droop as it formerly had in dihedral.

Just flattening the wing only gets you half way there.

John