Just hookup a clear line to your bleeder valve and the other end inside of a water bottle with some brake fluid at the bottom to prevent sucking air in. Go around each caliper and drum and bleed them. Have someone press the brake pedal to the floor before you break the bolt loose. Have them pump 5 times or keep pumping untill there are no bubbles. Even micro bubbles. If need be put a zip tie around the clear hose where it attaches to the bleeder to create a tight seal. I put 3 bottles of brake fluid through my truck before all my micro bubbles were out. While doing this ensure that your brake fluid never empties. Always top it off as needed to ensure that no new air is introduced into the system. I highly doubt you've got what they said. After completed pedal should be firmer than it probably is now but will never (in my experience) be as firm as it was with stock calipers. However offroading I've experienced better performance with the TBU as it is less sensitive and you learn how much the pedal needs to be pressed in order to receive a certain type of braking. Adjusting the pedal may be a good idea. I'm going to look Into that