Just a tip for you all using the EW Hobby gun.
I have read some posts about the Preformance tip not fitting on the electrode tip very snugly.
Some have used fibergalss tape to snug it up.
When I was experimenting with the EW hobby & pro guns. I found the same issue (Preformance tip not staying on the electrode end).
I found by using a pair of electrician Dikes/pliers, & using the rough tip on the end of the pliers to squeeze the electrode tip on the gun (just slight disform & roughs it up). The preformance tip stayed on tight, yet could still be removed for cleaning.