Hi Sam
Infortunatly my existing sender is still in the original tank, one of thereasons for changing for a new tank and sender is that the existing tank is half the height of the new one (25-30l at best) and the float arm had been shortened !!
Also the brass float is holed so it doesn't
Anyway, I knew the lord put wire coat hangers on the earth for a good reason (other than impromptu radio aerials

)
So a quick hunt through the wifes wardrobe supplied a siutable substitute.
Hopefully I will get some quality time with the 80 this weekend and start some of the upgrade jobs.