Halcro, as I posted on 11/16 the SP-10 Mk2 manual states that table will maintain correct speed if up to 500 arms could be lowered simultaneously while tracking at 2 g. Even with an error range of 10%, it should be correct with up to 450 arms! From that, your three arm test was not much of a challenge. ;-)
However I suppose the problem with the Technics statement is the table could "maintain correct speed" with up to 1K gram weight applied. That could be different from not maintaining speed at the moment the weight was applied. In other words, should one allow say one revolution to correct the speed with this weight? That would be a big difference in sonic terms.
So if I'm understanding this, your laser mark should be measured precisely at the moment each stylus is lowered onto the record with no time interval to allow your table to correct for the added drag.
However I suppose the problem with the Technics statement is the table could "maintain correct speed" with up to 1K gram weight applied. That could be different from not maintaining speed at the moment the weight was applied. In other words, should one allow say one revolution to correct the speed with this weight? That would be a big difference in sonic terms.
So if I'm understanding this, your laser mark should be measured precisely at the moment each stylus is lowered onto the record with no time interval to allow your table to correct for the added drag.