Hasselblad RM2 finder

I wonder if anybody here can provide real-use experience and advice on the RM2 finder.

I already have the PM45 finder for my 501CM, and have no complaints with it, with one minor exception. When that combination is in use mounted on my tripod at full extension, I can no longer see into the eyepiece even on tiptoes, so a 90 degree finder would help in this situation.

I have been considering either a PM90 or PME90, but am curious about the RM2 also. I like the idea of creating more distance between the eyepiece and the film back that you would get with the RM2, but am concerned that it might not provide 100% coverage of the focusing screen as it is a 3.0x magnification (I can not find a manual for it to state definitively one way or the other). My PM45 is 2.5x mag and only just covers the whole focusing screen.

Can anyone with practical experience with the RM2 provide insight on this issue, or anything else they feel may be relevant? Thanks.