Well, so much for brewing in January, I'll be lucky if it's February at this rate :-( Life keeps getting in the way of brewing and a new allotment has taken a lot of my time at present, but I have been doing 'little' bits of work to the brewery in my spare time. I got a new impeller kit for my March May 809HS pump. The original impeller vanes on the standard 809 are 15mm long, the new impeller has vanes 21mm in length and it's from the March May 815. The new impeller increases the flow rate to that of the MM815 which is a considerable improvement on the original.