I learned a lot from this thread, but I will say that foil section design is extremely complex, and the one thing I did learn is that by making the leading edge sharper you will cause pressure spikes that will ruin the performance. Remember the angle changes. Mess with the foil section at your own risk as you’ll likely make it worse (unless you have a theory, and are making changes at the trailing edge)
What you can do is change the planform with relatively low risk. Chop the tips.
Also changing angles is very productive, baseplate shim, tail shim, front wing shim if you can.