electrolytic series to double voltage question

[kramden66]

In this set the electrolytics are 475 volts , i have a feeling that a 450 volt would be ok its just the start up voltage may go at or above 450 volts and then drop thats why they have 475 volt caps in there , i could always order 500 volt caps but just for testing and getting the set up and running i was going to double the caps using two 450 volt caps making it 900 volts handling , so that would be way over whats needed but the caps would be ok .
the dumont ra-103 , ra-103D and ra-110 all use a couple capacitors in series with 100k resistors on them , designers put that in to avoid a higher voltage capacitor.

mike