I did a little aluminum welding this weekend with my new Passport Plus and my new spool gun. I had .030 wire and tried to weld 1/4" plate with not much luck. Not getting enough penetration. Then I noticed on the welding chart on the inside of the Passport door that .030 is only good up to 1/8. and .035 would be for 1/4'. Will the .035 wire really weld a lot better on the 1/4". What makes aluminum wire so material thickness specific? I just figured the .030 aluminum wire would handle the 1/4 plate with no issues. I figured I would just need a little more heat? Thanks....