Thanks Darryl.
Is alignment/centering an issue, or as close to straight as possible is the only rule?
Im thinking of using a belt or cord to hold in on to find the right positioning. As I'd hate to peel the double sided sticky and place it, then find that its not comfortable or where I want it.
May try these methods:
http://www.stefan-gotthold.de/Bilder/tubus.JPG
http://www.craigcolvin.com/Astronomy/telrad.html