@OldDutchman777: I know for sure that Rosewill and D-Link wall adapters are interchangeable. Tried that myself. Other than that, I don't use wall adapters any more. All cables have been spliced onto Molex and gobbling power from ATX/AT PSUs. (see my earlier posts)

@lanelander: The hubs/BEs can be really choosy where you connect them. A few examples from my experiments:
- D-Link connected to USB 3.0 port on one PC will have every second BE recognised.
- D-Link connected to USB 2.0 port on the same PC as above ad all7 BEs recognised
- A single BE connected to the USB 3.0 port on the above PC was recognised.

- D-Link connected to USB 3.0 port on another PC had all 7 BEs recognised.

- 1 BE connected to a USB 3.0 port on a laptop was not recognised
- 1 BE on USB 2.0 port on the same PC was recognised.

- 10 D-Link hubs connected through 1 Rosewill muster hub work like a charm.

You might want to go through the clean-up procedure that I described here:
https://bitcointalk.org/index.php?topic=300638.0

Make sure that you don't have gaps between COM port numbers in the UART to COM port bridges: Bfgminer can misbehave if you have large gaps.