All things are relative, of course, some more than others. Like this thread. It is so last century and multidimensionally challenged. Understandibly most confuse centrifugal force with centripital acceleration. Ever heard of a gyroscope? Ever heard of 'M' or string theory? Think your turntable doesn't have a vertical vector? What do you suppose has a greater effect upon the relative mass or size of your turntable:1)a 12lb Siamese cat lordosing within 1.25 meters of the power supply; 2)a 747 cruising overhead at 42,000 feet; 3)the Moon; 4)Mars; 5)the expanding universe. Guess what? Distance counts for a lot. Keep the cat away unless she really likes your Claudine Longet colection. You could save this membrane for at least a little longer by resisting her ascendancy to the NRAs guntelligentsia. My Walthar PPK is locked and loaded but who could not utilize a Glock 9mm. 9mm is the VTA of my Triplanar VII. Sorry.