I'm going to go a little against the grain here, because I'd rather see you safe than tell you what you want to hear. The welder you have is really limited. It isn't going to be good on sheet metal because that is where you need really good control, and for frame stuff, it just doesn't have the power.

It will work great, though, to spot weld your stuff, and then it can be taken to a pro welder to have it done right. I'm talking about the frame stuff here, because your life depends on these welds holding. I have built more than one car by me doing the spot welding, then going to a pro to have it finished right. I just don't trust my welds for structural stuff. I know my limitations.

Please understand that I am not dissing your welder, it does have jobs it can do. But for the really important stuff, have it done right. The cost is not really that bad, and you will feel a lot safer going down the road. If you want to learn to weld, take a vo-tech course. They have their good and bad points, but usually you can take your projects in and do them on good equipment, with instructors nearby to help you.

JMO,

Don