DCWilson,
You should post your question(s) directly to Brownell's. They encourage questions to their expert gunsmiths and it's free.
I have used this service myself and they were quick and accurate in responding.
Just go to the website at
http://www.brownells.com/aspx/NS/GunTech/guntech.aspx
and then click "Submit a Question"
Hope this helps.
Ron