"gear manufacture (so they would have us believe) is sophisticated enough to allow smaller diameters, and compensation for (periodic) irregularity with PEC"
The accuracy of the machining is certainly much improved on the smaller mounts, and periodic errors reduced, but flexure is still fundamentally a function of the materials used, the mass of the load carried (and the torque applied) and the dimensions.
I think I'm destined for the G11. Then next up from that is an AP Mach1 and that is overkill.
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