Installed bulk foil resistors in phono amp

Thanks guys. @mulveling @atmasphere 
If my point-to-point wired Croft 25R wasn't such an insanely-tight nest of connections, I'd replace some more resistors!

@gs5556 Good to hear. 
The only manufacturer I know of that uses bulk foil resistors is VAC in their ref or sig series at $80k!

But how high can you go? You can’t keep increasing the value hoping for more and more rejection! Maybe the designer deemed 1k enough.
The amp uses 2 diodes in series to bias the cathode. Can you suggest a better way to do this? I’ve seen NiCads and LEDs used.

I've never really had any issues with RFI. Would the higher resistance not attenuate the signal? Or is it negligible compared to the input resistance of the tube? I see there is a 47k on the grid of the next stage. I'd repace a lot more but it's a very fiddly amp to work on.

@atmasphere Shuguang Black 12AX7LS. Beats my Telefunkens.

Ralph, there’s a 1k on the grid of the first triode which I replaced as well as the load resistor.