Hi Paul (hitman) sorry to hear about the painfull injections.
We now have a angle neck with vapour spray outlet built in and fits the vikan one end and retrofits your pole the other, so just remove your waterfed pole brush and screw this on instead, then the end of your pole that normally connects to hose reel or trolley, connects to a 1 ltr pressure sprayer with trigger (comes with a strap) .
Shame it was not complete in time for the show though.