Interesting. I was thinking the same, Mark. Get a matching OTA for my current 8" f5 GSO and make up a solid support, a bit like JMI's reverse binocular RB-10. It needs to dismantle into two OTAs and a compact cradle/pier for portability. Not thinking of encoders/Argo/tracking etc. Keep it simple, I think - targets being the Moon/bright globs/bright nebulae and open star clusters (and the occasional great comet)! I suspect the focal lengths of the two primaries don't need to be as close as some suggest. Then, I just need to be able to translate the mirror end of one OTA in the Alt/Az directions for image merge. I'm thinking of a very simple two screw translation mechanism pushing the OTA against a spring (like GSO finderscope adjustment) But only people with my IPD need apply for a look
. Adjustable IPD is too difficult, but I guess I could try regular focussers plus diagonals plus 2" helical focussers above that and push the primaries well up the tubes - but that's getting a bit over the top with equipment, then, at the focusser! I've been picking up some cheap matched eyepiece pairs, so am starting to be serious.
