Lundy,
As an aside :
I got a 'medium' Rink grip for my Baikal MP46M.
The grip is superb, but I was surprised that with the palm shelf at its lowest position, the grip only just fitted my hand (and I do not have large hands).
I don't know if Rink grips, in general, err on the small side, but in this case they did.
Have fun & a good weekend
Best regards
Russ