I have been following your shaft issues for a while and have wished I'd tossed in my 2 cents earlier. My first installation was a nightmare also. Since then I have installed many.
What I do is pretend I'm a precision index head on a machining center. I simply rotate the shaft in .0001 increments while pushing. It takes patience which I don't have and can take 15 minutes of frustration. Try it, it works.
Glad to hear you're plugged in and ready to go.