Excellent site, Ron. Just what you need --- the vertical shaft tilted 15
to 20 deg. forward,

Here goes the old debate again. Are we talking the top of the
pivot axis tipped forward? Every tailwheel shimmy I had was partly due
to that, and replacing the tailspring or whatever to get the axis
vertical or tipped back a little stopped the shimmy. It's the same
effect as a bent caster on a shopping cart: bent back, it will shimmy.
Now I know that there are some aircraft manufacturers that specify
the axis tipped forward, and I don't know why.
The Scott we bought recently was to replace a shimmying Scott.
We had replaced everything else related to the tailwheel, had the axis
fixed and everything, and it still would not stop. It turns out that
the bronze bushing in the fork wears out, and Scott doesn't sell that
part separately; have to buy the whole fork, which costs a big bundle.
To avoid any further fooling around, we replaced the entire assembly
and the shimmy went away immediately.

Dan