Stop in for a cup of coffee

Rear cab mount aligned and centered, welded in. What a difference switching to .030 wire from .023. Welds much better on the heavy stuff. Now moved my attention to front mount/rad support. Original was one in the centre, now one at each frame rail.
My little Hobart 135 has been acting up It isn't getting a good weld and air pockets in the weld. I put on a new gauge on the Argon C02 tank but still pin holes.
Any ideas on what I need to do?