if a person can look at it and identify it it is not original, there is a difference between new design and old technique...remember the log cabin block...many people publish 'new design' quilts made from log cabin blocks...i think you should locate the original block and check the copyright on it. and maybe show it as a
variation of ...block. one of the big magazines put out challenges every year to designers to take an old block and make it into something new, if they can do it it seems like anyone could