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Hello,
The plywood rings were cut from left over’s from other projects and I used a router to cut the rings. It was quite fiddly and time consuming, clamping the work and cutting the circles, so unless you have the equipment, time and skills, I really wouldn’t bother with a wooden frame.
The cardboard models, if well made, certainly look strong enough and are also more lightweight if balance may be an issue? All I have to do is slide the C9.25 in the dovetail mount to re-balance the ‘scope. With a dob, this may not be so easy?
Solar filters tend to get used infrequently so if handled and stored correctly, there is really no advantage in making a wooden model, unless you have too much time on your hands…
If you build up the reinforcing around three points on the circumference wall of the cardboard model, I'm sure it would be possible to insert some nylon locking screws and provided you don’t tighten them too much, they should provide a good enough safety grip.
Cheers
Dennis
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