Thanks for the reply C, i also picked up a jar of track power grear grease to use with the ring and pinions gears.
The thing about the shaving off the uni drive shaft is how close the grub screws is to the end where it meets the pinion gear shaft. if i shave off too much it weaken it and end up splitting when i tighten the grub screws. I guess ill take off some from both ends to compensate if needed.
Thanks again!