my new kona stinky has a bent small chainring, i got it used, so i need to replace it. i do alot of trail riding. but i throw my chain alot. i was thiking to instead of replacing this small ring, scrapping them all and getting a single ring with one of those things that keeps the chain on. is this a good idea? i do go up hills, but can do that OK in the lowest setting of second gear. and if so do you have a recommendation of a good kind i should get? thanks for the help. i'll stop asking questions for today.