I have a problem with my 305g. The arc is hot and unstable with spatter, the puddle won't wet out and if I turn the machine down it just sticks. the arc sounds peculiar.I have changed out all my cables and bypassed my roll ups cleaned all connections and it's still the same.new stinger and ground too. Any ideas on what to look for next? Maybe the board. This machine is a new machine with less than 50 hrs on it. PS I run 2/0 cable with 1/0 stinger whip.