i have a sort of related question. I've got a 4 bolt stem that came with steel bolts. I've got 4 aluminum bolts that actually fit... would this be a "no no"? i've never heard of a stem coming with aluminum bolts and i'm not sure if i'd feel safe as they wouldn't be nearly as strong as steel (or ti). should i be looking around for Ti bolts if i want to lighten the stem up?