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I think I've made my 'Pseudo' Serrurier truss scope ( and am making the current RN 8F8 build ) so rigid nothing will move even if it wants to.
My primary reason for the original rebuild was to get the weight down so I could put the 10F5 up on the EQ6. My cage and strut dimensions were more to balance the weight over the OTA length so no additional weights were needed. As such it more or less accomplishes most of what a true Serrurier design sets out to do. My 10F5 build was so strong and immovable I could stand it on end and stand on top of it yet it only totalled about 17-18 kg up on the EQ6 including additional hardware.
The current 8F8 build will be even lighter although it's a longer OTA with an older and heavier mirror. I do this by minimising hardware and putting strength where it is necessary. The mirror in this case is heavy (2.45kg) but the mirror cell will be a diaphragm braced structure, almost hollow and the back plate similar. Check out progress in the DIY section.
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