Saving Dahlia seeds

Yes it's very easy to pinch dahlia seed heads though I don't do it? just as easy to ask?
A dahlia flower bud is round a seed head is pointed
Select a seed head with no green on it that looks dry remove and leave on a sheet of paper somewhere cool till completely dry and store till time to sow all the flowers will be different from the parent but if you are lucky you could get some stunning flowers