Bob Wagner
TDR MEMBER
renegade, there is no real break in period as long as the turbo is set up right in the install. Yes , take it easy for the first 50 -100 mile and then let the hammer down 
The shaft resistance as far as I have seen is always very fluid feeling with no resistance in spin whatsoever. If you are questioning the feel. I would make your concern known.
Hope this helps ,

The shaft resistance as far as I have seen is always very fluid feeling with no resistance in spin whatsoever. If you are questioning the feel. I would make your concern known.
Hope this helps ,