My 45xp can cut all damn day without stopping on my table. The book spec for running the speeds and such are bang on with my setup. Fine tip consumables are much more finicky but cut really well on thinner gauge. Can get some really incredible detail! Don't mess with the aftermarket consumables. Get yourself an air compressor auto drain on the tank and a nice water/air separator. Check the tip after cuts to make sure it dosn't have boogers on it, which will cause the torch height to be off.