i've never used rulers or templates to make flying geese. i always just made them. so, i see that the elonore burns flying geese rulers? templates? are on sale. but there are a limited number of sizes. i don't make geese that often, so tell me: those of you who make them often, is there a size that's most common? are her sizes worth owning? are any worth owning anyway, regardless of size? does anyone own these?