Not sure if this is kosher to ask but I will never know unless I ask. I used a defective ego adapter on my don and have effectively ruined the nylon screw part on my switch. Does anyone know of any part #s on mcmaster for the spring and screw? I'm all for buying them ENS but they are out of stock and I am with a down don. If this was not proper for me to ask then I am sincerely sorry for doing so. But I just want to get my don up and running again