Well ..I've got my GSO SCT 10:1 focuser.
It needed quite a bit of fiddling to get it right:
http://www.backyardvoyager.com/gsofocuser.html.
It is better now but not as good as I expected..a bit hard to tell as its too smokey outside to try out the C8.
I've adjusted it quite a bit and it feels pretty good now....time & use will tell.
It is obviously not feathertouch quality..and not feathertouch cost as well.