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Hmmm...
This design gave me some ideas...
I have 10" f/5.6 Newt built with Parks fiberglass tube (33cm dia) and Coulter Optical mirror (5cm thick, 4.5kg).
The OTA (with everything on) has ~12kg, a bit too much for EQ6 (yes, I know, lot of people will say the carrying capacity of EQ6 is 25kg (with counterweight), but generally I prefer not to load things up to the hilt).
To reduce the load, I built the Serrurier truss frame with 25mm aluminium square tubing, but ended with 10kg OTA (frame itself is 8kg, only 2kg weight reduction).
Perhaps the removing of the middle part of the fiberglass tube and replacing it with struts will be more weight-effective... I need to do some number crunching now.
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