Hi Ola,

I have made all connections using 4mm gold connectors, which I think is the most common way to do it in Europe. Also I have made an external "arming" system so I can wait until the last minute to connect the battery to the ESC. It has also been made with 4mm gold connectors as shown in the images below. The great thing about these connectors is the fact that only the tip of the male plug and the edge of the female sockets will see the spark during connection, so the contact surfaces will remain intact even after many flights. I would guess I have connected the arming +100 times, and you can see the condition of the connectors in the photos below. Not a problem in my mind.