I finally purchased a gently used DRRI in great condition and am about to retube with JJ's all around. The biasing discussions I have heard are based on using a Bias-Rite. But I will be using the method of dropping the chassis, placing the probe on the bias test point (TP36, which is R57), taking a reading and turning the bias adjust pot to set the bias. The Fender schematic says the bias adjustment using this method is -37 VDC. I am used to biasing my HRDlx with this method; the Fender schematic says +60mV at TP30, but HRDlx guys seem to prefer slightly hotter at +68mV. What would a comparable setting (or an acceptable range) be for the DRRI? Is -37 VDC cold? Hot? Thanks for any suggestions.