A nice piece of work Peter. Although I have given up side-by-side guiding due to the variable results delivered by the rig, I do hope you manage to tame your set up as it is an effective way of autoguiding.
I’m surprised you needed to brace the ZWO, it is such a light weight camera? Elimination of all flexure is the Holy Grail eh! Followed by clear and steady skies…
Cheers
Dennis