Ron: It will have to wait a spell. All my how-to photos got lost when Photobucket dumped. And I have a bunch of automotive work to do here of late. But I'll post as soon as I can get to it. Dan
I installed the Kadee under-track electromagnetic uncouplers in two spots on the newer part of my layout. They do work, even with delayed uncoupling, but they are tricky because the magnets will also attract metal wheelsets and will shift the position of single cars.
They also require a very hefty power supply. I had to buy a special supply just for these uncouplers.
I built my layout with the intent of being able to use either permanent or electromagnet uncouplers for all my uncoupling, but over the last few years I've decided there's nothing wrong with bamboo skewers, and I use them almost exclusively now.
It takes an iron man to play with a toy iron horse.
Ron, I posted a how to thread under the "Layouts and layout building" forum. Dan