@Mike H Mottler posted:Both "bricks" have a fast-acting circuit breaker, and I've never fried a circuit board because of a derailment. They seem nearly bulletproof.
Define "fast acting"? The circuit breakers on the Z-1000 brick are standard industry thermal circuit breakers. Fast is not a term that I would apply to them. If you want "fast" for a brick, consider the Lionel PowerHouse 180 brick, that's a fast circuit breaker.