Not sure if this will help, but the mini arrow combat wing has a similar taper to the mig-29. This video has helped me with my hot wire cutting and it is tricky to get a jet style wing right (I've had to practice a lot).
https://youtu.be/PBz1BsQZn3o
I have also hot-wired tapered sheets of foam (25mm inside of the wing out to 10mm at the wing tip) , then simply cut out the shape I wanted, and sanded the wing to shape, takes a long time though.
I know this plane is a giant prop slot but the shaped foam wing works so well and is worth the effort, they glide so well!