We do know how to build a miner. Our hashboards are running at 250Ghash with no problems or errors.

Option 2: Replace each Prospero (2 Thash) including the compensation package (1Thash) with 20 Hashboards (each PCB includes 2 x Minion ASIC, heatsinks, power chips, inductors, capacitors) – 4.5 Thash. Note that due to the lack of a backplane these boards have not been intensively tested therefore further rework might be required