Eric, Welcome to IIS
In regards to your first query I think the hoodoo-guru for that brand of focuser would be Mike Sidonio - strongmanmike and I'm sure when he sees this post he'll chime in and others too that are using the kind of gear you're looking at
And in regards to the EdgeHD perhaps you can read this here:
http://www.iceinspace.com.au/forum/s...ad.php?t=73635
Not too sure if it'll help but hey! information is the strongest currency today
HTH
Cheers
Bill