Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
The float height is measured from the join between the bowl and the body so if you reduce the level it closes off the fuel the float sits higher not lower, higher means more fuel in the bowl, of course I may be on the road to senility 😀😀
Ash. When you did the 500 carbs for that guy what internals did you use. Were they the standard 500 jets and needles or did you swap in the 450 bits just leaving the mixture screws as 500. Did the guy ever get back to you to say how it was running.