Swiss foil pro Balz Müller was so annoyed by this that he immediately screwed the "Locking T-Nuts" from manufacturer K4 Fins into his boards. In addition to the thread, a small Allen pin was inserted into the small plates, which allows the plates to be easily fixed inside the double rail of the board. So if you carefully loosen your foil the first time without the plates slipping and then fix them in the appropriate position, you only have to put the foil on and screw it tight from the next session onwards, eliminating the annoying sliding of plates. In addition, the favourite position is then saved.
The Locking T-Nuts are available in a set of 4 for both M6 and the thicker M8 screws for 25 euros. Info under www.locking-t-nuts.com

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