I might be going for a quad parallel single coil, rip did a video on it and got great results. Just need that screw driver. And one more, how can i identify the size of my screwdrivers, etc ?b

It's ok to experiment a little, but remember if the results don't turn out like you want, you'll have to re-do it. Also remember you are only going to have one juice attachment, so if it doesn't work out you don't have anything else to vape on. Remember, you don't have a backup setup to depend on. Start out with simple and easy for something that will be more reliable.
I suggest learning how to build A SIMPLE 1.0 OHM MICROCOIL at first. Learn to perfect that so that you get consistant and predictable results every time you build one, THEN advance to the more difficult stuff.
I keep telling you to slow down. Enjoy the journey.
If the screwdrivers aren't marked in some way, I don't know how you can identify their diameter. My Stanley Precision Screwdriver Set ($6 at Walmart) has the diameter in millimeters on the handles.
