JP Maxess front roller

The three front rollers on my Maxees seem to have too much spacing between them with the two end spacer on the shaft there is approximately 1/2' of free movement.On any photos I have seen there appears to be hardly any gap between the rolls,does anybody have any ideas or can tell me the size of the rolls as although they look original I wonder if they have been changed.As usual any help would be gratefully appreciated 

Many thanks Ian