Every annual, I end up replacing a tinnerman, or two on the doghouse. I've just about gone through my supply of the old style tinnerman U clips. All I can find now are the type sold by Aricraft Spruce and others which are a lot larger and thicker. The new style leave air gaps in the top of my doghouse and I really don't like them.
Does anyone know a source for the "old style" thin tinnerman U clip nuts?
The middle picture shows the old type next to the new type. The other two pictures are of an old style tinnerman U nut.