That's not too bad, I never saw the upgrade price, just Buy Now price. Makes sense an upgrade would be cheaper. Thanks,

I installed and played with the Bezier Curves tool, so far so good, it is certainly a lot easier than how I was making the paths. The paths may not match available tubing u-bend radius' to fabricate from, but it provides the visual concept well perfectly! Thanks again for the guidance! My test manifold for tubing alignment using Bezier Curves attached to straight stubs.

I wanted to put a big thank you to everyone again. This is not a drawing to true dimension of the lower manifold for my engine project, but rather a conceptual rendering. My core block and heads are still on the boat and I am too impatient to wait for them to arrive to measure and go to that detail with the design. But, this was an EXCELLENT instructional project to achieve my goals for the design. I still need to add the injectors and design the plenum for the proper volume and blower mounting, but that part is easy compared to the runners! Thanks again, here is the model rendered out showing the plumbing and base plate in place. Intake Manifold 3.skp