I bought used MHL lift carbon hydrofoil 2015 edition. It looks to be in pretty good condition.
When I foiled it for the first time it has this weird low herz vibration in low speeds. It is very noticeable when I make turns. Once I have some speed it goes away or I don't notice it anymore.
I think it is not normal but has someone else experienced similar. The foil is completely silent even in high speeds downwind. I checked the scews after the session and they were all tight.
Is it just that my foil has some flex that makes it to vibrate. Could trailing edge sanding help?