Hi Chris
Love to read a good story with a happy ending
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One suggestion, if I may and you haven't already. Check where the balance point is on your telescopes. Remove the dovetail from the mount with your scopes and cameras attached and balance them on a pencil. Mark where the pencil is to get the balance point on your dovetail. That point then needs to sit in the centre of your mount. Don't worry if it has to sit back in the mount a bit as all your weight will be in the front with newtonians I have the reverse problem with my refractors and my Tak is extremely back heavy. Just a thought and sorry if you have already come up with it.
You should have some clear skies for testing tonight and tomorrow night so get out there and test this sweet looking setup.
All the best and clear skies.
Wayne