Danny, I agree with everything you said in the last paragraph. I only use the Hobart with small wire and low settings, however the guns are not the same. The Miller gun will not attach to the Hobart as I was told, besides the pin connection, the gun will not fit the drive. I was hoping I could use my 15' foot Miller gun on the Hobart but that's not happening. Miller does not recommend anything longer than a 12' and Hobart is at 10 even though I use a 15 in the miller all the time.
The power pin is the end of the gun lead that inserts into the bore of the wire drive assembly.