Hi Kevin,
I forgot to mention that I used an Alnitak Flip-Flap on my 104mm refractor setup at PixelSkies in Spain. See photos and details here:
http://www.astro-sharp.com/2021/10/23/my-new-remote-setup-in-spain/
This was brilliant because I could control it remotely. I have recently replaced the OTA with a C11 and now I have to ask the folks there to place a light panel on to the C11 when I need to refresh my flats (which is not very often).
Cheers
Ian.