I built a 5e3/5e5 hybrid that runs 4 50's era Jensen P10R's wired series/parallel for an 8 ohm load. Real Tung-Sol 5881's, MM Pro OT, 5v4 rectifier, 5751 in v1. It's a big Deluxe with a little more bottom and projection from the 10's. It's in the background of this photo.