It's fun to see a post like this as I got a second hand Monarch today for a few hundred €. I just had to buy it no matter what. I'm on the same boat with f***ing  Slok with my problems with bfgminer.

I feel a bit dirty mining with it after all this fuss. It's a like driving a car previously owned by Saddam Hussein or something. But I like it. It feels like being part of history in the making. Like buying a DeLorean just when the company goes bust.

On a more serious note it seems to be running fine with the custom bfgminer provided by BFL. 600GH, 1% rejects and 3.5% HWE. Much much quieter than an Antminer S3 as the fan noise is just mild hum and not booming and whining like Antminer S1's and S3's.