In the same way that autosport enthusiasts try to reduce rotating un-sprung mass, I've gotten away from putting anything on the OTA that doesn't absolutely need to be there.

Focuser, guider, filters, cameras ... absolutely that goes on the mount! Computer? Nope. Cables inside a sleeve weigh less. I have some expanding mesh that keeps all the cables bundled together, with velcro ties to hold stuff in place while still leaving enough slack in the right places for the mount to move but no so much that it can tangle.

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