After upgrading the ESC in my WPL and JJRC trucks I found that I could no longer easily reach the switch to turn them on or off. The ESC is a fairly common inexpensive brushed with or without brake model. The switch drops right in place of the original electronics I pulled out, but the nub is too short and needed an extension. So I threw this together. Now there is a very good feeling switch interface that is easy to find by feel and has very positive tactile feedback for position. It is designed to engage the small round bumps on either side of the switch opening, I assume these are common on WPL or JJRC trucks. I glued the square capsule bit into the base with CA glue and then a tiny dab of hot glue to put the cap in place on the switch.