How big are these crewel pieces? I love the idea of incorporating them into a quilt :D:D:D
The only concern I have in doing this is the need to do some quilting in the crewel area.
All batting has it's quilting requirements on the bag. If you don't quilt it, that area could end up sagging or the batting shifting in other ways...
This could happen whether it is hung, layed over a chair, or used as a lap quilt.