Glad that the revised placement is working for you. One thing I haven't tried, now that the magnets are on the sides, is a magnet narrower than 1/2" so that it doesn't affect neighboring tracks. This isn't an issue with industry sidings, but in yard areas it might be. I am not at the point where I have to worry about it, but eventually I will experiment further.
In my yard (1 1/4" spaced tracks) the 1/2" magnet is just far enough from the adjacent track that it doesn't seem to bother anything.
However, there isn't enough room to put uncouplers on two adjacent tracks right next to each other. If I had a 5/8" or so wide magnet one could work for both tracks....