I am new to all this -been "lurking" - (btw, thanks for ALL the great info from all you-all!) I am considering using the Pellon "Jas Val-U-Fuse" fusable interfacing (very light weight) that comes on a board wrapped in plastic from JoAnns to use as my base for a string block. I used it to make the Sunbonnet Sue applique blocks and for the round center in a dresden plate block. Any problems with using that? I picture using it fusible side up so when I press it it will fuse to the strips, further stabilizing the pieces. I will be interested in your responses. Thanks, Evedib