i have a 9 year old r tech,not used a lot,today during use ,cut quality deteriorated with in square edges,so changed tip and electrode,then lost the arc,air is ok,the torch connection broke the fascia 2 years ago and has worked ok all that time,so I check the screwed connection,it took half a turn to tighten.should I replace the fascia first as a coincidence?anything else to look for? Thanks for listening.