I use a Pooleys PB7
Used a foldable one before but found that I could never easily access the information on the inside.
The PB7 has a ring binder on the short side and a clip on the lower long side.
I file the plates that I need in the ring binder bit and clip the rest of the stuff that I need under the clip.
Once in situ I stuff the map between seat and the fuse; use the checklist until line up after which it goes into one of the little pockets until I leave the machine again and use the clipboard when needed and when not needed stuff it where the map is.
Works for me.
FD