Need help deciding on best approach to tap into the frog on a Kato #6 (not #4) n scale (not HO) turnout so I can control a control panel LED powered from the track power. Due to design of Kato #6 turnout, tapping into the frog requires you to open up the turnout and expose the frog switching mechanism. If you have done it yourself, you will know that it is a delicate arrangement with few options to attach a wire to monitor frog power (rail A or B) at the frog. I have about 40 turnouts to modify so I am looking for a simple yet reliable way to do it that will not interfere with the existing frog power switch. Here is what I am currently thinking.
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Solder wire to tiny tab under the frog switch. I saw a picture of this on another forum. Involves removing the frog switch screw and the rotating T shaped tab it is holding down. Under the tab, there is a tiny piece of copper strip on the circuit board that is electrically connected to the frog. Not much area to work with but a tiny wire (24/26 ga?) can be soldered to the strip. Tiny wire is OK because all I am driving is a LED. Main concern it the limited space to work with. Do not want to destroy a expensive turnout.
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Install wire and connector under the head of the screw. I experimented with this and it works but there is a risk of the connection i