Ct0517,
As you know the ET2 is a very tweakable arm. I run slightly higher torque settings on the 4 arc bolts and for this reason I loosen them slightly before adjusting VTA. Your analogy of car wheels is rather odd. In over 35 years of running the ET2 the arc block is still original and in pristine condition.
I did have some customers who managed to break and grind down arc blocks by over tightening and trying to adjust VTA whilst overtightened and indeed one customer who managed to break 3 cartridges mounted on their ET2 back in the day, despite adding copious amounts of mass...
As you know the ET2 is a very tweakable arm. I run slightly higher torque settings on the 4 arc bolts and for this reason I loosen them slightly before adjusting VTA. Your analogy of car wheels is rather odd. In over 35 years of running the ET2 the arc block is still original and in pristine condition.
I did have some customers who managed to break and grind down arc blocks by over tightening and trying to adjust VTA whilst overtightened and indeed one customer who managed to break 3 cartridges mounted on their ET2 back in the day, despite adding copious amounts of mass...