The KOBE 7016 works very well, but you will still need to know the whole concept of running a Lo Hy root in. Practice with a 3/32" land and an 1/8" gap and run it pretty cold somewhere around 75 amps for the most consistent roots. Problem with running a tighter gap is, one little boble and you won't break down your root face and you'll have straight lines show up on x-ray. With a tight gap It will look like you got the penn you needed, but the root face didn't actually reak down. Don't get me wrong, you can do that with the right setup and if know what your looking, but for you a bigger gap will be more consistent. Keep the rod almost 90 deg to pipe at all times and tip it back into a push angle if you penn is going through to easy or if it's looking like your gonna blow through. You should barely be able to see the arc on the outside of the pipe. You want to be able to see the arc from the front side, so move your head where you can see what the front of the rod and sides are doing. No keyholing, so really watch your sides to see if they are looking like they are getting ready to keyhole. There is a really fine line here and this is where the experience kicks in. If the side are looking like they are going to keyhole, you can put the rod into a push angle to try and save it, but if that doesn't work, pull out and turn the machine down. Hope this helps ya alittle bit.