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Thanks for all of the replies! I was told that 2 would be over kill but I was wanting MORE POWER!!! I was unaware that things could go so wrong, and a chance of a failed eeprom sound like I better remove one of the cartridges... just in case. Thanks!

I have a Rostock MAX V2 that I built last year. I recently installed 2 heat cartridges and it heats up to fast to run the PID calibration. Is there an existing form to either adjust the voltage or set the PID lower to compensate for the extreme rise in heat?