Yeah, I've seen those liners, but never tried one. To be honest, I've had my clarke so long, i've pretty much sussed out everything which can go wrong with it. I use anti spatter spray on the tip every now and then, which helps, 0.6 wire, CO2 argon gas. The machine will produce an excellent weld, I did the battery tray on my mk3 XR3i the other day, and it's a nice tidy job. It's been run over, kicked, rained on several times, filled with sand in my blasting bay, and it still works! I can't complain, it cost £220 in 1997.