Haha well, I went ahead and threw the 470ohm resistors we had in parallel to each other to get about 160ohms with 3, and about 117 ohms with 4.
@160ohm
T1: 64.7V
T5: 69.5V
@117ohm
T1: 79V
T5: 75V
I'm about to give this a listen. I did add some ~1.5" leads in order to tack on resistors, so hopefully that doesn't make itself too obvious of a bottleneck.
Edit: Plugged in, this thing sounds crazy! Bass extension, detail retrieval, soundstage are all the best I've heard on the t1, even though the treble can be a bit more cutting than the Mullard ECC82. I must say though, the tubes are getting extremely hot with this setup, even after just 10 minutes or so of play. What can be done heat sink / transistor wise to fix this while still allowing for stock resistance use?