So, I'm thinking of building a Milholland Double Eagle for my first plane. The fuselage is 4130 steel tubing and the original was made using a gas welder. I want to go TIG because it seems to be better in many respects, just harder to do.

Now comes the question; what machine would work best for me and grow with me as I move up to more complicated aircraft like Sonerai or the like?

I saw where Aircraft Spruce has one (the Invertec V155-S) that is small and affordable but I'm worried that it won't grow with me. I surely can't afford to spend $3k on this but I also down want to throw away $1.5k either!

Has anyone used this machine or simular power machines and how does this scale when I start building the more complex and larger aircraft?

Thanks for your time,

SNZ