normally if u use one.. across on off switch on u did itOK, that's what I come up with... lots of cleaning work.
No more bypasses around bridges etc., as that seems to be the practice nowadays, no more snubbers etc.
I have seen some fitting a 0.01uF cap in front of the primary of the transformer (or is it at mains between L & N for both transformers?): I wonder if you go for it... or not. Please let me know.
That's probably my last point re PS, so if you spot anything please shout, any help is greatly appreciated!