no worries i'll take a few tomorrow but rmember the old vw's ? had a spacer between the gen' pulley or washers , remove or add to lower raise the belt in the pulley ? or pack up the generater for belt tension . trial n error way of doing it though but seems to work .. done tonight sorry if its a tad dark and yes the brass nut is going to be round too the front pulley is 2 part as you see, the washers fit in between to raise or lower the belt in pulley / loose or tighten . as i couldnt get the exact size after @ 5 i think places this is the closest i could find and its sooooooo close !! drum is driven from the cutter reel , on a realy slow idle it does stop spinning clutch is next thing to look at as it needs to idle so slow its hard to keep going at all . cheers Dave