I picked up a used 18 Vapor Probuild. I previous Vapors, 2015 and 2016. Only had 3 sets on the 18 so far and really like it. I ball parked the fin to the factory long and shallow. It has excellent speed out of turn which makes it a very low effort ski. I ran 8 passes in a set and could have kept going. On side is awesome, it might need some fin adjustments to optimize the offside but its not bad.