You might check out the Flip Flat.

https://optecinc.com/astronomy/catal...k/flipflat.htm
It's not exactly what you want, but may serve 2 purposes.
(I don't have one, but know a couple folks do).

My RASA gets manually capped the morning after a run if the WX looks like it will be bad for a few days. Yes, I have forgotten a couple times.