I'm 64 years old, 6'2", 175 pounds, 30-32mph @ 15 off. Skis have been 2014 Senate Carbon, 2016 Vapor Lithium, 2017 Senate Lithium. All skis have been 67"and skied each ski for 2 full seasons. Always the same boots Radar Vapor/Strada /RS-1 over the years. Never changed boots at the same time as changing a ski. Always set the fin and boot settings accurately to the same Rini or Rossi numbers I'd been using. Skied 3 days a week almost year round for the last 5 years, so 200+ set a year. Always at my club lake at The Quarry in Corona, Ca. (which now is shut down with no water). All the major variables of boots, fin setup, site, boat and conditions are neutralized. So when I changed my ski, I would take one safety pass without chasing the balls to make sure nothing felt odd... never did. Then straight into my normal set. Run my 30 mph opener 3 or 4 times in a row, then run 32mph a few times. Each ski felt very similar but only "better" in some subtle way that I continued to appreciate the more I skied the new ski. Changing from the 2016 Vapor to the 2017 Senate Lithium I definitely felt the Senate was easier on my body after skiing. I believe that the RADAR design philosophy for the Senate as a slightly wider version (0.2 inches) of their highest performance ski is key to my experience.