Clarity Cap offers a 450, 600, and 700Vdc cap, among others. Is the 450Vdc enough - the original used it - or would the 600Vdc be a better solution, giving more headroom. I know that you shouldn't go too far beyond the voltage a cap "sees" in order for it to form properly, so I wonder if 600 is too large. The operating voltages are roughly 385-380-320 for the three stages of ST-35. I'll be using higher uF values by the way.
Thanks for any help