Hi Chipp, here's one method that may work ok for you, see attached 3DM file.

This method starts out similar to the tutorial you referenced, by drawing a centerline, then using curve offset and then trim to cut a 4 sided thickened slot out of the main shape.

But then after cutting the slot, I selected the 4 boundary sides and used Construct > Network to build a surface to fill it. This filled surface now has a UV structure that follows the contour of the ridge, you can try control point editing it or the way that I thought might be easier to control is to use it as the target surface for a surface-to-surface Flow, that way you can build the ridge as a separate straight piece which is easier to tweak. You can see that piece off to the side which I built using Construct > Loft with "Loft style = Loose", then drew a plane underneath it to use as the base surface for the Flow.

The continuity is not totally aligned from the new piece to the main surface so there is a very slight shading change at that boundary but it's very subtle. If you require better continuity you could try cutting away a small strip and using Blend.

It looks like this:



- Michael