SR,

For Rib #1, considering that the fabric is shrunk, wrapped around and glued down to the inside edge of the rib, it is not going anywhere without rib lacing anyway - at least with polyfiber - can't speak to other covering systems which I have never used. It was no big deal to drill the hysol on #3 and lace that rib so that is what I did. # 2 rib was only laced behind the rear spar on our plane but securely poly tacked to the bottom rib forward of that.

After many years all is well with this in spite of my flying