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Not sure of the Powerstation or TSL set ups but thats very close to Prodrives 1mm toe-in settings. 1mm on a 16in. wheel is 16.7 minutes if i remember correctly.
I haven't worked it out but if you have 17s and was at 13 minutes then i guess it was set to 1mm (Prodrive) as the angle needs to be slightly less the bigger the wheel.