Hello,

I am trying to create an attachment to a wing leading edge that has multiple bumps along it for 3d printing. I have created multiple sketches in 12 planes and was hoping to loft through them to create the 3d part, however I cannot select anything at all to assign as a profile for the loft process. What do I need to do to be able to loft these sketches? Is there a much easier way of creating this part?

The finished part should hopefully look something like the top of this wing:

I attach my file. All help would be very welcome!

Chris