Ok so I got a rubber paddle broom for my FS 90R and put it together... i think. There was a mystery washer that was not in the directions floating around inside the rubber boot thats attatched to the gearbox and also covers part of the tube. It looks like it goes over the drive shaft and fits nicely in that hole that the drive shaft goes into. Just want to make sure this is where the washer goes and also if theres anything else I should make sure of before I bend the ends of the cotter pins on the sides of the drums to finish. I definately see the value of the combi system cause this is never getting changed again!