if the feeler gauge to adjust the neck relief on a les paul is as thick as a piece of paper then it is about 0.002 inch = 0.05 mm not 0.50 mm
if the feeler is 0.005 inch then it is about 0 .13 (0.127) mm not 0.50 mm
in Europe they recomend 0.30mm to 0.50mm neck relief
this confusion makes me mad
A piece of paper is 0.05 mm , then why they say 0.5 ? It;s like 5 cents of a dolar or euro and 50 cents it;s different . I have found schematics and layouts to build a complete amp and i can;t find a set up les paul guide in mm . makes me mad