FOIL DRIVE Assist Plus Downwind Foil Review - on a wingboard?

Great fun testing out the new Foil Drive Assist Plus on a short downwind run, but this time on a 4'2" wing board.
Riding: 4'2" x 22" x 5 1/4"
AXIS Foils ART 899
82 cm alluminium mast
350 Progressive rear wing
Crazy Short fuselage