Hi
I've made a few side by side plates but they are for more weight than you'd be mounting. Mine are 300 x 100 x 10mm and 250 x 80 x 12mm and are for 102mm x f6.5 scope and 80mm x f5 guider and ED80 + 80mm f5 guidescope.
Can't see the harm in going for the 8mm plate just for more rigidity though I don't see the need to have the plate so wide, 100 to 150mm would be plenty.
Clear Skies
Jeff
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