Nothing unusual, I am a squirrel for sure. These boards are cheap and small and the power supplies are interchangeable so it is less than it appears. I know you are examining the possibility of building a tube amp with KT-88's and I too thought about that. Roy Mottram convinced me that using the upgraded ST 70 transformers really wasn't the way to go and I would be better off waiting until I can afford the proper trans. So while I sell and save I am keeping busy with these little chip and transistor projects. The only problem is the upgraded chip amp boards are sounding very good the more they break in. Listening to them on a daily basis I am very pleased and have lost some of the urgency surrounding the tube project. Therefor I am considoring using the newly ordered tube xover boards on a smaller sized Pi project; maybe the Stage 3, and powering each driver with a chip amp. Garman, have you seen the BEBE-T amp project site? It is Rod Elliotts class A death of Zen amp. Good reviews.