Not sure what to do?

[Nick]

Yeh, well it was fine until I want to change the diffs'.

Basicly:

The cvd cups come with grub screws, that grip the output shaft. The cups, are cillinder hollow, with no flat edge on the centre, so they don't "fasten" onto the output shaft. So if the grub screws arn't extreme tight, it spins around inside the cup, going no where.

I want cups, that take the stock pins that go through the output shaft, or cups that take grub screws and have a flat edge on the inside.

Understand? Confusing but basicly done a bodge by using hex pins inside the cups and a grub screw to hold them in, silly me can't get the pins back out - should be able to with some force but want a good working soloution to replace it with.

Thanks. :)