I had finished installing the short shifter, it went in ok I suppose, but then I tried to screw on my shiny new "Knuckleball", and no dice. It just spins, clock-wise, and counter, I can't feel the top thread catch at all. The knuckleball screws onto the old stick, and the old knob screws onto the new stick, but the combination that counts, doesnt work. Before it went in, the new knob did screw onto the short shifter.
So what I think happened is when I had to hit the top of the stick to pop it into the ball socket, I must have compressed the top threads, and the new knob is machined to closer tolerances then the OEM knob.
Bummer sounds like you buggered the top threads. Here is the correct pitch if you can get a tap and die for it. 12 X 1.25mm if it's not too bad you may be able to use a fine file and repair it but my guess is if you hit it directly, metal to metal it may be too far gone.
i did the same thing today and the sad part is the way i got it on required no hammering they need to send "test" levers so people can experiment before they put the real one in . the knuckleballs should have plastic threading instead of metal, to allow a little play :curse: