I had one of my Mules fail at the exact same place on the tube, at the bend below the fritted disc, but mine was under pressure! The break happened when I was unscrewing the valve to release the liquid butane for evap., and you can bet I was being gentle because this is already a replacement valve on the tube. . . thank the gods of planning for safe practice and a good environment..... Sheesh. What a mess, what a waste.
Be careful. These things are UBER fragile... I still like the idea, but this is an unacceptable failure imo