Can someone please tell me how to adjust the height (distance from the primary) so that the secondary is centered in the focuser? It seems as though I should be able to rotate the long center bolt without also rotating secondary mirror - it should be height adjusted by the threaded central bolt/acorn nut assy while keeping the mirror facing the focuser.
Anyway I'm struggling and can't figure out how to get everything tightened down one I have it where I want it.
reference picture... The center bolt threads into the spider's central cylinder with the vanes which would be between right 2 nuts in the picture. Those two nuts appear to be used to lock the height against the central cylinder. Is the acorn nut on the left supposed to be hard against the top of the mirror holder?