If you bought your chute FROM Stroud, you will recieve a mailer over the winter which is a two for one sale on the bags (at least last year) ..... I carry two spares............. my chutes open up really smooth, although getting the attachment point at the right height may be the partial or total reason..........
p.s. A few years back I tore a chute panel on my push bar wheel bracket, so I like the Stroud setup.