P3 Labs Extended VTS Ramp Kit (Version 2) for the Sea-Doo Spark (14-16)

Hey guys! Looking at purchasing the p3 labs extended ramp kit for my 2015 seadoo spark 3up. I already have vts and ibr on it. I see they offer a 2017 venturi or you can shave 1/4" off your stock one to run this kit. Now my main 2 questions are:

  1. Is there any benefit to getting the 2017 venturi? Or is modifying the stock one doing the exact same thing with no drawbacks
  2. Do I need the vts kit that they offer or is that only if you dont already have the vts.

Thanks for the help!