The last vital bit of kit you need is a set of asymmetric speed fins. Get the fin choice wrong and it’s like putting a Morris Minor engine in a Ferrari. Assy fins are the speed sailors weapons of choice for many years and they are definitely what works best here, as the trip back upwind is on a truck and trailer! Which assy fin do you choose? It is a very is a personal thing and is very much dependant upon your weight, technique and how you like a fin to feel. The length on an assy fin required is generally 2-3 cm shorter than a standard symmetrical fin, as it generates more power with less drag. Size needed varies from 18cm to 21cm as a max. I use fins made for me from Sonntag in Germany. They custom make them to my weight, board and sail size and I took with me 18, 19, 19.5, 20 and 20.5cm so I was covered for all eventualities.