I'm new to all this... just went to an antique shop and picked up a Gillette Super Speed Red, a Slim Adjustable and 2 others (they look really plain to me) and anyways, I got these for $15.95 total. The slim I'm having issues adjusting, I loosen the doors, and twist the adjustment thing and all parts begin to spin!!! i go to tighten and the door knob and head of the razor spin while the handle stays in place with my fingers. this razor looks perfect, it just seems to not work right! can someone help me get this thing fixed?