So, I'm planning on making my own e-pipe. I already have the wood shaped and ready for drilling, but I have a question about a button switch. I'm going to use a 18350 and my plan as of now is going to be using an axle pin (looks like a top hat) and a spring. I know it will work, but I am wanting to use a button sort of like how Epipemods do theirs. I have looked and looked and watched a lot of videos, but I cannot figure out how that style of button works. Can anyone help me out with this?