Second question is regarding velvet helmets. I have a velvet helmet that fits me pretty well...the problem is that it doesn't have a chin strap. Is there a way I can add my own chin strap? I've seen them with elastic, which I could do myself, but they don't seem very secure (I could be wrong...I've just seen pics of them with elastic). It's a nice helmet in good shape, so I'd rather not have to buy another one (paid $7 for it at a thrift store).