i just had a vision to mod a dauber nib "the ones with plastic foam nib" so we all kno fire melts plastic. creat some metal "stencil" or "frame" shape of a heart. line. whatever heat it up slighty. and press it agaisnt the nib. hopefully the plastic melts where it should and create the shape. i unno. ima try it whenever i get them bingo daubers "i always got the 12 for 6".