Shaft and wheel are one piece. Its not as simple as inserting a higher quality shaft only in the centersection... you have to make the Turbine wheel/shaft combo work. Unfortunately this wheel is just very small, and if you use it you are stuck with a tiny shaft.
Originally Posted by GreenPlease
Excuse me if this is an ignorant idea but if the turbine shaft proves to be too weak couldn't we just replace it with a titanium shaft of the same diameter? Seems like that would only cost $40-50 in any sort of quantity. Could apply some low friction ceramic coating to it while you are at it.