Hi new to the forum, looking at buying my first mig welder and have 2 in mind the clarke 151TE or the clarke 160TM. I want to use it for bodywork on my transit, plus making bike trailer frames, racking ect. My question is which one would be the best welder? I want to run a big co2 bottle so how hard would it be to convert the 151TE? Thanks for your help, J