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[USER=354]@mark40511[/USER].  There hasn’t been much improvement on airflow for Rainbows since 1980, sadly....even some later ones were worse than previous ones ...ie the SE PE model had worse airflow than the earlie SE model .  According to Blackhearts’s and Vaclab’s airflow testing ....very little cfm improvement ...like 4-10 cfm. :-(. I bet the water lift is similar or no improvement over the same period .  I really hope he hoped for airflow improvement comes from a improved power-nozzle design if it’s true that they are at the limit for power on a water based machine .    Heres to hoping for the best!!