I'm not sure it would be very easy to solve a hardware issue like that. Especially if it changes with altitude. Does it not slip during a focus run with high altitude pointing? I have multiple Crayford focusers that don't suffer from slippage (two Moonlite and my SW Esprit focuser). So I don't quite know how common of an issue this would be. And regardless of this specific problem, I'm sure both features would still help many.

It might be worth considering a new focuser, unless you can live with the issue it presents. I would assume, all the existing methods of focus will stay with the system, and you could continue to use those as you have.

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