Hi Jim,
For F3A the 60/120 amp version should be more than enough. They also have a 120/240 amp version.
To my mind this is a superior and safe solution. It looks professional too which is important for me. The fact that a magnet is used to actuate the switch is a big plus. Far less stress will be placed on the fuselage side with the arming and disarming process. It also eliminates the spark when batteries are connected which is something that really irritates people including myself. This anti spark feature should make your connectors last far longer and improve their reliability too.
I have got one of these switches on the way from Germany so I can report about how good it is. It looks great on paper so far.
I'm told they have been on the market for about 12+ months. I was also told that most of Emcotec's dealers don't know of it's existence... Surely that's just bad marketing...[&:]
Cheers
Jason.