I use 3 PW ZW's for power and 3 of the 5 loops have powermasters in-line. Each loop has a 10amp fast blow fuse to protect the engines from any type of derailment, etc. Bought the fuses from All Electronics with the help from someone here on this forum. Bought a hundred for 12 cents each with shipping at $7- 100 cost me $19 or 19 cents still cheaper than Radio Shack at 5 for $2.50.
My other 2 loops have TPC wired inline there so I can run any 3 rail engines in conventional mode with a cab-1 or Legacy remote.
Fred- any other questions- give me a shout.
Thanks.