Hi I'm a new member/welder (just started). A lot of the little knowledge I have gained about welding has been thru these pages. Thank you. My querie is...why would I go for a Murex saffire Guage 5 over a Guage 3 (apart from the thicker metal weld/cut)? Is the 5 made sturdier? They're roughly about the same price. I have trawled and trawled for info rather than posting what may be a stupidly obvious question/answer. Thanks for any info.