Hi Matadem, I'm kind of surprised that worked ok for Mike previously - it's a situation that is problematic for Flow because of the central collapsed-together point. The way Flow works is when it is sampling the objects to be deformed, it finds the closest point on the base surface and then evaluates that on the target surface. With a collapsed central point there is an entire edge of the base surface that's all on the same point.

Maybe an approach that could be reliable would be to form a cone with a little opening at the center both for the piece being deformed as well as the base surface. For Flow you can't trim out the opening it has to be part of the underlying surface structure so something like revolve a line that's a little distance away from the revolve axis.

- Michael