Your arm has no provision per se for VTA adjustment, however, there are after-market gadjets that permit this adjustment. Expressimo Audio (now out of business ) has one, I think VPI makes one, - it can be found. Do change the back couterweight to a dropped weight, get it off its feet and on to spikes, cones, blocks, etc., set vtf by adjustment of the counterweight - do not use the spring adjustment. Set it on maximum and use a Sure guage for the weight.