I bought my rack while the parts where on their way from USA, noobie error on my part! lol
I only matched up the 20 degree angle not the DP
End up buying new 60tooth gears with a hub on and new spur gears for mod 1.0 rack and drilled out and reassembled the drives, at least now if I ever need to replace the spur gear they're only £5 :)