Hey WillBellJr,

An alternative you could use here would be to combine to operations with the sweep function.

I use the freeform tool to click my path, then you can use "quick circle" to click out the diameters along the path at different intervals and diameters, then sweep the quick circles with the path.

It isnt a single command, but it isnt that much more work. One downfall is if the complexity of the path and the interval of the diameter change become overly involved, useing the different viewports to "orient" the quick circles along the path, becomes tedious, though for lessor variations in the diameter along the path it is draww, click click click, BANG! Pipes along a path.

Burr