I think the 75mm bowl mount is pretty standard, never had problems. And all my stuff works on the manfrotto 325N Bowl Adapter which is a 100mm bowl with the 75mm adapter plate - again all good, though cheaper chinese fluid heads (the 325n and a lightweight fluid head is crazy-rig-city sometimes) can have a different thread that doesn't match the manfrotto thread choices of the adapter. But on a tripod, just make sure you use the bottom-tightener-female-piece-thing that came with the head.