I did the rookie mistake of buying a used kickwheel with a cuphead without noticing it. The head doesn't seem to be changeable so I have to deal with this, for now. Since there is a smaller part under the hydro-bat, I thought that maybe they could fit. But I'd love to know if it's possible before buying some. I could buy the mold to make the bats but I find them to be very expensive and I haven't found any used ones.