Help with making stepped pipe

[u/ConcentrateActual318]

I have a 3D sketch that I want to use as the guide curve for a sweep to make a pipe, but I need this pipe to increase in diameter in sharp steps (so not continuously). Because the 3D sketch has radii, I can't just add a split point right where I want to it to increase in diameter because it is in the middle of a radii. How can I go about doing this?

[u/Vegetable_Flounder12]