can you unhook with the peak?

[Flyboy]

but in anything more than 15 knots the 6m Peak flaps like crazy. Might work better heading more downwind, but that would leave you unable to get back upwind.

If I push hard upwind by edging the foil (straps help) my 5m will not flap until much stronger than 15kts.

Then as you say, it will not flap on the downwind track either.

Peaks flap mostly when you are just foiling around 90 degrees of the wind, "travers" for French or "beam reaching" for others.

Yes, it's true you can minimize flapping by picking your angles ... but it's not really satisfactory to stay overpowered in that way - better to rig down.