Wobblinwheel

Over here, in the U.S., one can go to an auto parts store and buy a "feeler gauge" set. Here, again, we can usually find them very cheap. The average set consists of about twenty or more varying thickness "sheets" of steel (magnetic) used to measure the "gap" between various things in the mechanical world, such as spark plug electrodes, piston ring end-gap, etc. In every case, in my experience, is each "sheet" is EXACTLY the same width, and just a tad longer than the Kadee "between the rails" magnet. Atleast a half-dozen or so of these things are thin enough to "stick" right on top of the magnet (they won't hit the rails). Bend down the leading and trailing edges as not to snag, by chance, the trip pins. By doing this, you have effectively "killed" the magnetism, and the couplers will not uncouple and little or no attraction to axles or wheels. Making a little "handle" of sorts with a magnet on one end can be used to remove the sheet when the uncoupler is needed. The only care needed is to not place them on the magnets "cockeyed" as they will short the rails, and/or snag the wheels. Contouring the front and back edges of the "sheet" helps to avoid this. I've been doing this for years without issue. By the way, the type of 'feeler gauge" I'm refering to is kind of like a "folding pocket knife" with a whole bunch of blades, all a different thickness usually in .001" increments. The thinner ones (naturally) are the only ones you can use. I don't know what you "Englanders" might call these things, but maybe someone can help me, if necessary, with my terminology!