On Thursday, May 3, 2012 10:33:42 AM UTC-6, soartech wrote:
Open up the wing, wrap the spar with Kevlar and carbon fiber/epoxy and
carbon rod top and bottom.
Lots of info on this at many web sites. Reassemble the wing. Do a 10G
sandbag test.
Document everything and ask for an experimental certificate from your
local FAA.
Or call it an L-13plus and go fly.

I think an easier major modification towards an experimental certificate might be struts (which I suggested to MM long ago and was also suggest by some gent in Brazil).

It actually might look okay with struts;^)