Bump up the 250 ohm to 330 ohm if you want it to run a little cooler.
Call it a day, seems sorted as long as it is sounding good.
Agreed about wrapping it up. Going to do a filter cap change in the next week or two once the parts arrive.
Is it any issue to run the tubes at 14w? I have no doubt JJs could handle that, but what about other production 6v6gt's? I suspect these Ruby's will be short lived at that level.