Looks great Doug. As far as those alt bearing are concerned, strips of kitchen counter laminate (like Ebony Star) work really well. I bought some years off eBay, when I built a custom base for my 12" Dob.
I think Dennis at DobStuff also has some components that might help:
http://dobstuff.com/parts.htm
Look here for Teflon blocks:
https://www.ebay.com/itm/Dobsonian-T...edirect=mobile