The power busses are 2 x TipTop Audio Zeus Studio Busses, one in lower row and one in mid row. I will wait with the upper row until I get modules there - won't last long I imagine. I got the TipTop Audio Cincon 4.6A Power Supply to run both busses, it can drive up to three busses so I am safe with the upper row when I upgrade.

I got it from Rubadub in the UK.