Yokomo YZ10 '94 diff building questions

[eddscott]

So every time I pick up this build I get owned in some way!

I have some questions.

Which way do the diff plates face? Shiny side facing the diff balls or dull side?
I assumed it was the dull side facing the balls.

How many balls should go in the thrust race?
Think I put 8 in but there were lots of balls left over.

What is the part number for the thrust race screw set?
I have used ZC508 but the screw is way too long. I'm thinking the MR4 screw would fit ZD508

I think the wrong screw was why I could not get the diff right. It was either too tight and wouldn't move or too loose but felt horrible and uneven.

For what really should be a simple build I'm making a proper meal out of this one