Calibrate Drop machine

[dainova]

Hi,
Do I need to calibrate drop machine, I just think that nothing changed with G for last 10 years, and believe to good job by Gamma designers and Tawian craftmen, who already made their calculation and put all marking on shaft.
Machine is like Alpha Pioneer III.
Also I need to ajust grips each time I'm using different gauge of string,
Is it OK ? Or I need to service somehow those clamps, they also have some minor setback when I release tensioner, maybe anybody can recommend any upgrade for them.





Thanks