[ATM] Collimating mechanisms

[Jay Kirkland <jaykirk2@compusmart.ab.ca>]

    Years ago when telescope tubes were long and solid, Brit TMs 
advocated using long threaded rods with handles that the observer could 
reach while looking in the eyepiece for finely collimating their scopes.
    For years now I've been using Rob't Cox's 4 point orthogonal 
push/pull cells for my scopes. It suddenly occured to me that with 6 and 
8 tube truss tube scopes, there are either 3 or 4 attachment points for 
the tubes on the spider end of the scope. Those are just the number of 
points you need for collimating, they are handy to the eyepiece, and 
they are even more widely spaced  than points located behind the mirror, 
making for even fine collimation. As nothing I think of is ever 
original, I thought that before I try to re-invent the wheel that I'd 
ask the group if any of you are using these attachment points as 
collimation points for your scopes. And if so, how have you combined 
your truss tube clamps with the collimating mechanism, if that's what 
you've done?
    Jay

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