Hi All, I’m trying to lengthen the red and black wires in an MTH passenger car because I stretched the chassis. The problem I’m having after stripping the sheathing off is, it’s impossible to solder to the factory wire. Even using flux and getting everything hot, the solder sticks to the new wire but the MTH wire. Is there a trick or you have you replace their wire and find tiny end connectors? 🤦♂️
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