I also have a clone (WeberDisplays 939D+) that I bought on Amazon. Grounded tip. Takes Hakko tips. It sometimes hums when first switched on, but I tightened up everything and now it stops.
I also have a soldering tip for my propane torch, for the bigger soldering jobs.
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I am using a cheap Chinese clone workstation (Aoyue), it works ok. The only
minor issue is that sometimes there is 60Hz hum from the transformer block.