Great to hear! I cant stomach the thought of guts getting sliced open or private parts - shark bait! lol
With direct drive setups the proper foil and board it 50% of the setup, if those two are not matched for low thrust setup then your toast. A planning hull is critical, the wider the back of your board the better, and flatter the bottom as well. a surfboard that tapers in at the back won’t work with the direct drive.
Direct/Jet drives are safer and sleeker with much less drag than a large prop and duct, but the trade-off is a much wider board, little longer, and a flat bottom.
What size is your board, and what foil, also what is your weight?
And yes, if your RPMS are maxing out then you have left over torque to use and a 3 blade should provide more thrust.