[morzh]

Well.....this might work but I have to warn you (and I think this was raised in that thread at the link too) - you have to be careful about increasing the first cap value. What happens is it reduces the ripple and the rectified voltage goes up, and might go up quite a bit so now you have to check your B+ and other power voltages and see if they ventured too far from the specs.
In any case higher voltage will make your tubes run hotter.