Hey JX53mb, just wanted to pop in real fast and say thanks for sharing this cool feature with the community. I shared this page with some of our vehicle physics developers and they had some advice about what you had asked me about:
PhysX doesn’t support cylinder sweeps, and currently don’t have plans to add it. However, you could make a cylinder mesh with convex simple collision and sweep that yourself.
If this is a sweep, you could include the components to ignore in the sweep params.
I hope that helps, let me know if you have questions.