I currently have a 2011 rxpx and a wakepro 215. I modded the rxpx a couple of years ago using a tried and tested formula I read on here and currently get a consistent 80mph on gps.

I'm now looking to upgrade the wakepro 215 and want to see if there is somewhat of a formula for a mid 70s to 80 mph ski. I'm assuming that the wakepro 215 is just an RXT with some added electronics for the towing of riders? If this is true can I just upgrade with RXT parts?