Narrowing a 8 3/4 diff.

Hello everyone,
I posted some videos up to YouTube of my differential narrowing. I'm not done yet but I'm hopeful to have the housing completed this week.
Perhaps it can help someone out.
Maybe if there are some guys on here that have done this before, they could chime in and let me know their opinion if I'm screwing this up.
This is my first time doing this.