Going a little iover kill on input shaft myself.More expence but less than breaking shaft and messing up new converter I am odering. By the way FTI is having 10% off till 4-15-15. They also have a deal that for 200 bucks you can get life time warranty and you have 1 year from purchase date of conveter to start warranty. Just food for thought. freinds seem to think that selling me a warranty on conveter means they will be out of business soon,not sure why they think that.