I have been wanting to build a mech mod since I started vaping two years ago. I have finally finished my first all mechanical 18650 pipe mod. It is made from mahogany turned on a lathe. It has a Fat Daddy 22mm 510 and I created (from rough instructions) the magnetic switch on top. It works perfectly. It was a steep learning curve for me. Now that I have done one the next pipe will be all about refining. It is an addictive hobby!