This is a great instructional video, thank you! We have one Schwinn AC Performance w/ Carbon Blue whose handlebars will not tighten in the F/A position. Someone really cranked the knob down and now the knob is "stuck". The handlebars are loose though and slide back and forth on the bottom slider. I can turn the knob with a set of vice grips but only the plastic knob turns, it does not turn the treaded screw portion of the knob. I've ordered replacement parts: the knob, washer, collar and the captive nut which slides in the tray from National Gym Supply and these should arrive in a couple of days. In the meantime I am trying to figure out a way to get the assembly apart. One thought is to use a hacksaw to cut through the plastic knob to get to the embedded screw inside the knob. Since I have a replacement knob I can sacrifice the old one. Have you ever encountered this problem and if so, what did you do? thank you
