Froggy, I gave you an incomplete answer. If you don't retrieve the PL data from Twinspires, RDSS will still provide an Rx3 score. Obviously, the Rx3 score won't contain the PL data. Instead, the CR+ (enhanced Class Rating) component of Rx3 will be given extra weighting. Or at least that was the case the last time I corresponded with Ted. He's always tinkering with his formulas, trying to improve them.
You can see the difference on the last two posts of this thread:
http://paceandcap.com/forums/showthr...849#post108849