went out to the shed & found the tank had droped about 5 liters of fuel
        
 over the motor/shed floor from around where the pump bolted in...
         
        
 I have had a few pump issues so it's been in/out a few times & the plastic threads in the tank were getting a bit floged out so didn't want to thighten
        
 them to much in case they striped totaly...
         
        
 So I have had to spin up a alloy ring to bolt to the tank that the pump
        
 bolts to.... it has 6 bolts with washers/nyloc nuts on the inside of the tank to hold it.. with a O-ring to seal it to 
        
 the tank with 6mm O-rings around the bolts...." and sealant to be safe"
        
 the rings... 135mm OD / 84mm ID / 6mm think....
        
 So theres one way to fix it if anyone ealse has the same prob some time...
        
 now have a really true surface for the pump to seal on...
         
         
        
 
         
         
        