first off wow! one of the best customer service i have ever had! second this machine is great! I am cutting up a old shipping frame to get project metal out, it is cutting like butter! it is super easy to set up right out of the box. depending on the air hose they send just use a heat gun on low and wala it will flex right into place and not leak. DO use tape on the threads on the reg, I put one of my qd on it and no issue, no leaks. I have run this on 220 and 110. works fine on either, BUT, HUGE warning and must do, if you change from 110 to 220 or other way around, you must!!!!!! wait and let the machine sit un plugged, it says 2 min, give it 5 min to be on the safe side. it senses the line voltage and the caps must be disscharges and then plug in with machine off!!! then turn it on and it take about 15 sec it will wake up, it senses the voltage then comes on. the fan is a high volume and quiet. the machine has not ever shut off on me while cutting thus C chanel apart. I have had many brands and kinds of cutters, welders etc, this is so far amazing! light and just flat out works, I use a wire brush to clean the tip now and then, and it is lasting a decent time so far, I marked the front gauge for the lower and upper air psi so its easy to see and make sure is right. i set it just above the .3 and it is ideal and running this on 35 on the read out, supposed to be 35A but it is working better then oxy asetaline! I don tneed to use the rest it comes with but I can see it being handy for some work. DO NOT just drop or throw down the torch as it has a ceramic cover, it will break, and I really like it better then some of the others with a black bakalite cover, they burn up any way then the brass end is open and it will stick to the work , haha, not fun. but this one is great. I LIKE IT!!! over all this gets A plus, and the seller also gets A ++ .I want to also add, I am using a small 150 PSI HF compressor I think it is 2.8 cfm but it keeps up just fine and will cycle and not just keep running so it is not over using the air supply! thi makes it very portable, also on the 120v plug i ran it on the 3500W inverter genny! it didnt grunt at all! ran it just fine. set at 20A and was cutting 1/8 angle , very pleased with this indeed!