Re the Player-One OAG, I started this post at CN:
https://www.cloudynights.com/topic/9...x-light-leaks/
Good luck with that OAG! It looks good, but isn't really in my opinion.
Peter
pS: For what it's worth, the OAG inbuilt to the StarlightXpress wheels have always worked well for me. They are simple, but not terribly robust.