Last year we discovered a manufacturing defect in one of our MagVair 4340 (CrNiMo alloy) crankshafts.  To determine the he extent of this problem we recalled all of them for close inspection and found no additional problems. We are in the process of finding a new manufacturer for our crankshafts, and we hope to resume production later this year. We will announce on the web site when we have new cranks in stock.  Stay tuned.