Tony,
It's tremendously useful putting the ruler in your shot. I spoke to Luke from StarStuff
http://www.starstuff.com.au/ yesterday - cause his gear and machining capabilities look real interesting.
On the WO gear - the combo looks nice as does the Vixen Style Dovetail
http://www.telescopes.com/series/wil...ings-4451.html
But what extra gear do you need to mount a C9.25 do such a plate (given its round and the plate is flat)?
Off all the rigs I've viewed over the internet I like John's best
http://www.pbase.com/takman2/image/70937547
Build around the Robyn Casady tandem bar.