I saw Slowboat use a 5.5m 3 years ago in a 15-22 knot seabreeze on his 112 Mistral from memory. Was rarely off the plane.
At 70kg I can get a 5m going in around 18 knots,fully powered up in 23 knots.
At 105kg you should be able to get a 5m going with negative outhaul in around 23-24 knots,fully powered up in 27 knots.
Basically,short of using micro size sails,no one sails in winds much above 40 knots in normal water conditions.
Going back around 10 years - I remember watching Slowboat and Robbie Radis get caught in a 40-45 knot squall on the Swan Rver in a winter front.
They went down both using sails around 5.8m about the same time and did not get up again for a good 10 minutes

till the squall passed.