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After a few hundred welds, this diffuser is holding up way better than the cheap ones I used before. The gas ports are precisely machined, giving me a stable arc with no spatter issues.

The threads lined up perfectly with the insulator and nozzle I already had, so installation took about two minutes. This thing is built solid and hasn't loosened up after a full day of heavy use.

Swapped out my old diffuser and the M3T-D threads onto the 15TG gun perfectly with no gas leaks. Having to buy the bushing and nozzle separately was a bit of a hassle, but once everything was together, the weld puddle looked cleaner immediately.