For the pre and CD I'd take the idiots approach and look at the primary side fuses and see what their ratings are. That might be a half-decent estimate of start-up current draw but who knows about steady state. I don't think either's draw should vary all that much in use, should they? The mono's, bah, I wouldn't even hazard a guess but again they're probably fused... As to how to size the trafo, search me, if you neead a larger hole for a new trafo let me know. That I might be able to help with. From what I remember of Mark (voodoo) buildilng one of these there was a fair amout of give and take to the design in picking the right trafo that wouldn't give you way too much V-out but also wouldn't melt under load.