Clarke welder settings

[cirrusjock]

Hi

I have just bought a clarke 151en Mig welder that is converted to gas. I have been practising my welding and hope to start tacking bits of my chassis together soon.

I was wondering whether anybody else using the same welder could give me some advice of what they found the best settings for welding the chassis.

Also, I am going to order one of these rent free gas bottles on ebay. Would I be best with CO2 or Argon/CO2 mix? If Argon should I get 5% or 20% mix.

I seem to be asking lots of questions at the moment. Hopefully I will be able to give others some answers one day.