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One other demented DIYer here.
Just wondering if you had considered the requirement to collimate the primary in that design. I will sketch up my thoughts on the design aspects of the rear end and the options for dovetail mounting. I have a couple of ideas regarding the secondary mirror too.
Do you by chance have the details from the original scope regarding the primary to secondary spacing? If not, are the mirrors marked with their specifics such that we can calculate this? If not I suppose having the secondary able to move up and down the tubular rails and using the tried and true solar projection would be enough for us to get the focal point to a reasonable position.
Mounting:
For the past few months now I have been toying with the idea of building a large pillowblock mount with these optics in mind. I've got a design on paper that I believe will be more than enough, my only sore spot is the worm wheel and gear. I know I could buy a byers 11" 359 tooth wheel with a worm gear and a motor for around $500 usd. And I know that would be superb. I wonder however for a scope that will be used for lunar and planetary only, is that overkill? I feel yes however I can't seen to find any other options.
Another aspect of the mount design that I was wondering was, G.E.M. or forks. Gem would possibly be easier however for lunar and planetary work the ability to go through the meridian undisturbed by a flip would be advantageous. I could modify the G.E.M. Design I have to allow for tracking a reasonable distance past the meridian.
For now. I need a coffee and to get back to my assignments but the pondering shall continue.
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