yeah after my last attempt i looked at where the hose connected to the caliper, its rusty. so i guess ill have to take the brake off and send it to the LBS, but here i think they gave the shop set up for their "skiing" so ill have no bike service then. was thinking of just buying a whole new back brake set up, because i do have a few bucks laying around for emergency bike things. i was thinking of, Srams XO, because this weighs in as a cross-country bike. would i also need to buy a new rotor? or just keep the 160mm in the wheel? front brake is good, but in the spring i will send it in for bleeding.