No idea about boats but this is an excellent wing adjuster for planes like F3A that have 8mm anti rotation pins. You can either use four or just two on the rear. If they are ever in stock that is which is rarely! (best buy a spare pair then).
Certified Buyer Rated
Mar 01, 2013
Excelente producto, permite regular la incidencia de las alas y corregir 1,2,5 grados. Muy buen Material y una excelente terminacion. Lo usamos en modelos de 50cc
Excellent product, used to adjust the incidence of the wings and correct 1,2,5 degrees . Very good material and an excellent finish. We use it in 50cc models.