its been a few years since i used inventor, so im messing with fusion right now till i get back in the groove before i buy inventor when sweeping, i made a circle sketch on top plane. then i made a spline on the front plane starting from the center of the circle on the top plane two different sketches, two different planes. but it wont let me sweep, i need to peirce the plane... how do i make the spline peirce the plane?