hello all . i contacte jetcat today about the suspicious nicks on the leading edges of the front compression blades. i bought mine usedwith a plane and has been sent in for service the past two years.. mine has 9 hours total time.. the guy told me when they balance the compresser fan they cut nicks on the leading edeges of the front blades . not the trailing blades.. he told me aslong as no vibration and runs good leave IT ALONE. HE SAID IN A VERY SURE WAY. LEAVE IT ALONE IF ITS RUNNING GOOD. HE TOLD ME IT WOULD HAVE LET YOU KNOW REAL QUICK IF IT WAS UNBALANCED.. SOUND WIERD BUT I GOT THIS INFO FROM JETCAT ...HE DID SAY PUT A FOD ON . VERY IMPORTANT FOR YOUR SAFETY AND ENGINE...TAKE CARE GUYS...PAT