Hi. Just finished my one-12 combo with a 5e7 circuit. I ran across info indicating Leo often undersized his output trannies to produce a lot of punch. My son's Vibolux at 35 watts is the same circuit as my 40 watt Super, but with a very small OT. Both are great, but very different character, especially bass and volume/headroom. Anyway, I put an old Deluxe Reverb OT in the 5e7 with amazing results. More headroom, lots of punch. Of course, similar to my Deluxe, but has a tweed vibe, touch sensitivity. Thee are only two mods: an off-stby-on switch instead of separate toggles. I also swithed the 250pf coupling cap to 500pf. It allows more mids through. Just thought I'd share that for you builders.