Looking good Jason. I'm waiting with baited breath for you to try your short circuit tests....... (I'll buy you a steak dinner if you can do those tests without your blood pressure rising about double... There is indeed a way... Now you are getting into an area I explored with my current bench power supply I am in the middle of building. You can do this in the analog domain but it's kinda complicated in my opinion, requiring kinda precise tuning of several R/C circuits. Rather, I thought I might do it in the digital domain using an Arduino or even a Raspberry PI. The idea was to sample the input and output voltages, take the difference, add about 20V (so that the charge on the caps feeding the pass element was always about 20V more than the requested output voltage). Then based on that difference voltage calculated, determine the conduction angle of a rectified sine wave that would charge the PS cap to that value. Then turn on an SCR for the correct number of microseconds that would allow rectified B+ to flow to charge up the caps to the that value, then turn it off at the bottom of the rectified wave cycle. I'm pretty confident this would work quite well. I got all the way down the path, far enough along to design the software algorithm that would do the job. But when it came down to prototyping it, I moved away from that approach because I felt a microcontroller was just another part that would eventually break, and I didn't want to have to worry about servicing the power supply in 10 years...so I back tracked and went a different approach. I don't know a whole lot about switch mode power supplies, but I think you could also do it that way--vary the width of the duty cycle to get that cap charged to the proper value so you have minimum voltage drop across your pass device.