I wouldn't ground the sender through the tank. All that's making that contact are those three small tangs on the lock ring. I would ground the sender like the factory did. It'll be a better ground
So 2 points on a hopefully spring steel clip would be better.
I don't think so.
I bet you could put 50 amps through the lock ring.
Anyone got a spare tank, sender and lock ring and want to blow stuff up?
Simple test.
Attach a heavy lug to the sender, install as normal, get 5 headlights in parallel, one side of the bulbs to battery plus, the other to the lug on the sender, then heavy lug on tank to battery negitave.
