I'm in the same boat.

I've got a 4 star 40 and I'm about to install this exact same tailwheel.

How do you fix the spring to the rudder? Just force it in? Should I drill a tiny hole first, glue anything? The big spring seemed weak to me, but I'll probably go with that and just put the spring further down in the rudder for more leverage.

I'm curious to how the spring stays in the rudder, I don't want to drill anything If i'm supposed to just mash it in.

thanks.