Hi- just saw post. Look at my Gallery with Bleriot XI. I used a trim iron to attach fabric to ribs' undersurface. I started near center of rib and work my way back. I previously applied plenty of Balsa-rite. Judicious application of the iron was the watchword! It wasn't difficult at all and the covering is still intact on every rib after 3-4 years(?). The airplane is finished in polyurethane varnish for a nice golden glow! With each passing day gets prettier!