That is fortunate you got your money back on the frame, mining isn't for everyone. I will be doing some testing over the next few days once I have the final components. I am fortunate that the electricity is free for my rigs so that really helps my profitability. At the current difficulty and price I expect an ROI of 7 months if I stick with Zen Cash. However I anticipate the price may increase over the next few months as they continue to develop the currency and bring secure nodes online. This will have the most impact on the ROI I reckon.