I added an electric switch machine to one of my Merkur switches. It was not easy. First, I went with an LGB switch machine because the throw of the switch is pretty long and the switch is heavy. This may not be needed with some of the changes I made to switch, but there is an added anti-derail feature of the LGB switch that helped.
First, the throw of the Merkur throw-bar is too long for the LGB switch. Also, the switch spring is too heavy and the screw holding the switch point is too tight. I removed the spring and loosened the screw. I then re-positioned the throw-bar closer to the screw that holds the point. This required cutting some metal off the base. I'll add a picture a little later.
The good news is that my modifications worked!
George