Hi Guys, I have 3 Gillette Black Beauties from 70's. 2 short and one long. The short versions look good but the adjustment will not change the clearance between the blade and razor at all. ie, the blade is locked in at position 9, wide open. I would like to disassemble these razors and do a super clean up plus inspection to see if I can get them in working order. I have searched a lot for disassembly instructions for the Black Beauty, but have found nothing. Can anybody direct me to a link that would be of help? Thanks from a new member but a wet shaver since 1963.