Hi Sean
Welcome to the FRA site
I had never heard of battleswitch but it looks interesting and I might buy
one to use in my Robot.
It sounds like you have narrowed it down to the battleswitch ie the solenoids
work via other means.
Are the battleswiches suited to solenoid operation-who else uses them?.
One point I can help with is-there should be no fuse before the removable link.