I was using the longer fin which it came with- assuming that is the 42.
The sail I'm using is a 2 camber Maui Sails Titan 7.5 (biggest sail I have)
Do you think that a longer fin than the 42 and/or perhaps more of a formula size fin would help in the lighter wind to get it up on a plane? Thanks. And thanks everyone for your feedback. It's nice to know I'm not alone in having some initial difficulty getting this board up and moving.