I built a mount once and the RA had a meter radius disk.
It was early days for me and although to work for visual I was not precise enought for it to be used for astro photos..it was esentially a fork mount with the disk attached to the fork where the scope pivoted. ..it housed a 10 inch that I built using two old chip heaters for parts of the ota and caravan annex poles to join them.
Alex
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