I know the topic here is the electric switch tracks, but here's another idea to consider... the manual 5021/22 switches.
One advantage of the MPC-era designed manual switch track is the placement of the activation lever, which is horizontally operated, from the left to the right. This design lends itself very easily to be adapted so you can use nylon fishline to operate the switch track.
I drill a small hole into the switch track lever, and then 2 holes in the layout surface on each side of the switch track lever. I run nylon fish line from the switch track lever, through the holes in the layout surface and then to the facade of the edge of the layout. On this end, I use short pieces of painted wood dowel, one painted green and the other red to indicate which to pull to change direction of the switch track.
I call this a poor man's operating switch. NO, you don't have the automatic anti-derail feature. But you don't have to deal with the buzzing of the solenoid, or figuring out how to rewire all your switch tracks.
As a side note here, I thought I do some photos. Simple enough. But then I somehow imported hundreds of pictures accidentally into my train folder and I've now been at this "simple" job for a hour and a half... and am nowhere near finding the 3 photos I wanted. Suffice to say, I will never ever put anything digital on to my train layout. I run trains for fun, not frustration!
