I took one out and measured both arms:
small arm center of pin to center of screwhole 3 1/14"
small arm end to end 3 13/16"
big arm center of pin to center of roller 8 7/8"
big arm end to end 9 9/16"
hope this will do it. I am not going to return the crank handle, that works just fine and I will order another. if the operator covers are all the same then i should keep those as well. Can you tell me if they are universal?
