Hi Herman,
I use Cruizer and other Levitaz wings since they exist, about 100 times a year and 10% in salt water, jumping a lot and change or open wings screws every 1 - 10th sessions.
Since 3 years since I use torx screws and a torque spanner I have no problems with loosening or hard to loose screws.
I use a troque of 6,5 Nm for all wings also the Cruizer at a body weight of 63 kg. If you are heavier I would go higher up to 8 or maybe 9 Nm
Levitaz says in his
manual!
https://levitaz.com/uploads/download/Le ... 7_2018.pdf
"Tighten all four screws M6x20 to 9±1 Nm tightening torque with the Levitaz mounting tool."
I would not go up or over 9 Nm, but I use the following technique:
Tighten all screws to your personal level (6,5 - 8 Nm) then load foil being upside down both wing halfs in the middle assymetric with well about half of your body weight (same how it happens while riding when ventilating one wing side).
Then you will be able to turn the screws with same torque another about 20° and there from my experience they will stay for the next 1 - 10 sessions till you try to open which should be easy without high wear.
And no never used any paste on my Levitaz foils.
But if you have once ridden arround with loose screws the screws or even the fuselage threat can be damaged so in any case first buy new high quality screws and if they start to loosen it can be a damaged fuselage threat.
In this case you could try to build 23 mm long screws as this shouldn't be to long, but you have to check this yourself!