@cleeds
Arm tube angle is positive or negative and you can only change it by VTA adjustment on Technics tonearm if the arm tube is not parallel to the record surface when the needle is on the record. If tonearm manufacturer can't give you that option than a cartridge spacer or thicker/thinner mat can help (on Technics turntable the OP is talking about).
VTA is always positive, by definition.
Remember that VTA is the angle of the cantilever to the LP surface.
Arm tube angle is positive or negative and you can only change it by VTA adjustment on Technics tonearm if the arm tube is not parallel to the record surface when the needle is on the record. If tonearm manufacturer can't give you that option than a cartridge spacer or thicker/thinner mat can help (on Technics turntable the OP is talking about).