>Darrel, where the fabric is cut out for the steel piece, there could be a >little wrinkling if is wasn't cut out and stuck down precisely. If it is >like that on the ground as well as in the air, I would guess you have no >problem. If it looks fine on the ground and distorts in the air - that >doesn't sound right. There is such a thing as a fabric tester-and one is >non-destructive. Another thing you might check is this-Mr. Bowers >recommended "glueing" some of the fabric to the ribs with Pliobond. I can't >remember if it was the wing ribs also or just the tail surface ribs. If your > fabric is just glued down and not rib stitched, I have heard of it coming >loose. You might check that. I rib stitched all mine. Good luck. Mark >Goldberg. Austin TX Flybaby N95MF Thanks Mark. Like I said previously to Ron, it wrinkles slightly in the air, but not on the ground. It's 30 year old ceconite and I know it needs changing, but will have to wait another year for that. What I was wondering is if this slight wrinkling under load is normal and if the spars do indeed bend slightly under normal flight load. The fabric is ribstitched and shows no sign of lifting off the ribcaps. It's just that wrinkling outboard of the flyingwire attach brackets that has me curious. Darrel BTW, when I recover, it'll be with the medium weight Polyfiber process. With all the coats of paint that are on it now I suspect I'll reduce the empty weight by 30 lbs or so.