I'm almost finished with the work on a 66 vibro champ I got a few monnths ago. I did a cap job, 3 prong cord and replaced the plate resistors to fix some crackling. I added a 1k/5w ceramic screen resistor and replaced the cathode resistor with a 5w ceramic 820 ohm (and 50uf/50v bypass cap). The amp sounds great and I'm happy with it. I only play with single coils and p-90 like pickups and don't get breakup until 8 on the volume, which I think is normal? What is the highest plate voltage you would want to see? My plate voltage is 414 and I think the dissipation is 14.1 which is right at the limit. 414 pin3, 414 pin4 and 30.8 across the cathode resistor. I'm thinking about swapping the 1k screen resistor for a 2w/2k and wrapping it up. Should I be concered about the 414 plate voltage?