This is a manual switch for a Traxxas TRX4 platform. So you can turn on your truck after you get the body on. I modified and adapted the excellent design from Puredeath found here. www.thingiverse.com/thing:2486727

However, that one didn’t fit my TRX4 so I made some adjustments.

1. Print all pieces. Push Rocker-Mk3_NB through Mount_Mk3. It is a tight fit so push hard till
   the pegs line up with the holes. There is also Rocker-Mk3 that’s a lot easier to get in but requires a 3mm bolt to hold it in.

2. Take off the ESC and put the Mount_Mk3 under it. The arm should fit between the step rail
   and Truck base.

Good to go..