Hello! I'm planning on building an RC airplane by modelling and 3D printing its parts. I want to use a construction method similar to traditional wood construction using ribs and a leading edge solid skin.

For an example of what I mean, here's a traditional construction method. First, we have the ribs that make up the structural element of the wing:

https://www.modelairplanenews.com/wp-content/uploads/2014/02/SR-CA-3.jpg

Then in traditional construction a thin, flexible layer of balsa is wrapped around the leading edge and glued on:

https://www.modelairplanenews.com/wp-content/uploads/2014/02/SR-CA-4.jpg

I want to make the construction process easier on myself (and make my 3D printer do more of the work!) What I want to do is take a rib, then extract a piece of the leading edge and extrude it into a very thin walled extrusion so that when I print it the leading edge will be printed along with the rib, extending well above the flat rib. Repeat for each rib and glue together and I have a wing!

In order to do this what I want to do is take the rib, then extract the leading edge curve and extrude it with some wall thickness so it'll print. I've tried copying the rib, shrinking it, and then using boolean subtraction to create a leading edge but when I do that the thickness of the leading edge varies because because of how scaling works. I'd like a uniform thickness... I'm sure there's a way to do this but I don't know what it is.

Thanks!