Pilkie said:It basically stiffens it all up,so it doesnt warp when screws are done up.
There was a set on ebay recently that had the metal inserts went for £150,,, 160714600095
Some older repro's are quite stiff,others are very floppy!
have you looked at these people The Sherborne Rubber Company Ltd | Rubber Suppliers in BirminghamHi
I am trying to track down supplier of door/window seals with metal insert,can anyone help?