XJET You call it luck----I must be a super lucky guy----Because I buy and help other flyers with problem engines when everyone else gives up. There are 2 things that are certain. The ST 2300 run proper will outlast an OS of like size........And the number 1 problem is a Super Tigre will run on the lean side when others won't giving some people a false sense of tune. I would guess over 95% is attributed to a rich low needle and the WOT is a touch lean to compensate for rich low. The other is trying to burn 15% in a Super Tigre..........