Thanks Ash, I actually found some thick foam sleave meant for a push bike grip, sliced it down the middle and fitted that, and it worked all right, but as I said it snapped in the end so got the heavy duty one. Plenty of ways round it but just seemed a bit of pain.
Not sure anyone can help? I could do with a fan jet 8002 I think it is, that does not leave a wetter line on the fan edge. Tend not to notice it on pile carpets but on loops or low profiles it's quite clear. Thought of trying a brass one but have not got round to it yet.