On float arrangements, it obviously has some range at which it will work fine, no different to a concentric, Mikuni, Dellorto or any other under bowl design of carby.......even total down draft like on an Aermachii......however on some carb designs the float position is more critical.......On the French Godet Grey Flash we took to Goodwood last September, the 42 mm Dellorto SS1 with matching remote float bowl needed the bowl mounted to the rear........this was due to the pilot jet arrangement to the rear of the carb body.......on heavy braking, the forward momentum of the fuel would starve the pilot jet, thus when blipping the throttle on down shifts, the engine acted like the ignition was turned off.......nothing there......so by moving the bowl aft of the main carb body, this helped to overcome that issue.......That took some head scratching I can tell you........Cheers.