Congrats on the CHL2.5. What did it cost? The website doesn’t say.
A great advantage of an OAG is that it it compatible with the main scope and it also does not need a dew heater. Imagine if the guide scope dew heater went bad in the middle of the night.
Meridian flip is a challenge, I am always awake for it and attending the event any way. My biggest fear is not being able to center after a flip. For guiding, technically the prism should be picking back up in the same corer of the sky as it was doing before. And one thing I constantly have to remind myself is that there will be more stars visible in the dark sites when I do my real imaging than when I practice from in between trees out of my house.
I have not done this for almost a year now any way. A parallel guide scope would be a good backup.
Farzad