One of my friend also assemble rig. I purchased 2 rigs each with 170 MH/S mining two coins together. She made atleast 50 rigs. Very enthusiast about cryptocurrency . she is also an IITian. Only bad point she took all money in advance thats also inform of bitcoin but no loss I got my rigs in 7 days of payment.You can contact at vanishasoni@gmail.com.