Back on February I bought the Pace ADS200 with ISB stand plus 5 Standard Blue Series Tips and I just did the firmware update from Rev 1-2 to Rev 1-4.
It works like a charm. No issues.
Delivery time: only 4 business days after I sent an email to Aaron (Pace USA). 4 days!
Changing the chip: About 10 mins after I read carefully the well-documented instructions.
So thumbs up to Pace and Aaron for the excellent after-sales service!
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I've read all the thread and comments so I thought it might be helpful to share my experience.
I have zero problems with tip oxidation, failures, soldering station noise, etc. I use leaded solder (Kester 331, 63/37 & Kester 245, 63/37) and brass wool for tip cleaning. Everything goes smoothly.
I use mostly the 1130-0019-P1 1/16" 30° Chisel and it's like new. In the beginning, the station was kept on about 5 hours a day for 3 weeks at 350C° during soldering if that's something.
Advice: "You should always add solder to the end of the tip after use or when you place the iron in it's tip holder", Aaron, Pace USA.
The thread has a lot of info and tips about the soldering process such as Pace ADS200 settings, temperatures, how to extend tip life etc.
Note: The solder I use is a matter of personal preference. You should always check the datasheets!