I've have a Dumas 24" sprint running on 4s 5000, UL-1 motor atop a K&B lower, spinning a P-215 or X640 to a top speed of 45 mph (gps). CoG at 30% my ride height is about half of what you run an I got a couple degrees negative trim. My VS-1 hull runs a similar set up(P-limited), uses a TFL large lower, get the same results mid 40's. Lower your ride height a 1/16 or add a degree of negative trim, see what happens, one change at a time if it don't work, go back try something new.
PROBOAT BlackJack 24", ShockWave 26"
MRP U-31, 3 tunnels VS1, MRP Bud Light, Dumas HS Sprint
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