Thanks MB, that is somewhat clearer than my reply I guess. Yes, a 900kg square block of concrete can be made to run on hydrofoils, but under what conditions ;-), I'm sure that chair was nice and dry when they decided to stop.
Any-who, if it is intended to be practical (maybe not in the scoope here) I would aim at a larger size. Note some of the findings from Hoppe, smaller HYSUCAT's are much harder to balance (LCG sensitive).
But I don't want to dampen your spirit, please continue with your project.