Step 12: Test it
-The bottom part of the secondary goes to ground. Mains ground works out at this power level, but do not have sensitive stuff plugged nearby. A dedicated ground is ideal, though.
Hopefully, you will get the Tesla Coil working. If it doesn't, read below:
-Sometimes one needs to connect the primary the other way around; see if swapping the connectors solves the problem.
The Tesla Coil has capacitors that will remain charged after you turn it off. Be sure to discharge them before fiddling with the circuit, and double check that they are discharged before poking anything.
Bonus: Add some salt to the breakout point and the streamers will be orange instead of blue. Unfortunately, I did not take any photos of this before the MOSFETS died.