Then curve the hands around the front of the joint and press the keys so that the bridge mechanism opens or lifts. Doing this permits you to slip the lower joint bridge key under the upper joint bridge key. Now hold the lower joint in the right hand, toward the lower end of the joint, with no excessive force on the keys or rods. Make sure that all corks are sufficiently lubricated with cork grease. Twist the joints in combination in a back andforth motion, as opposed to by turning the lower joint in a round motion. The joints should slide easily in combination, and the rings in front could be in line. After inserting the upper and lower joints in combination, twist the bell into place after which the barrel. The barrel has a small and a large end, and though it is doubtless obvious to you, make sure that your youngest scholars place the barrel on in the accurate path, with the bigger side of the barrel becoming onto the higher joint. Finally, place the mouthpiece on the barrel, after which the ligature and reed, in that order. Remember to keep the tenons well greased with good, clean cork grease, but do not allow too much of it to increase on the cork. Instead, wipe excess grease off before making use of more so that it doesn't get sticky.