Originally Posted by Chaos Zero

Update: As more confirmations come in, Chaos Zero has made some amendments. You are not stuck with 1.50 or 2.71 SE-C once you’ve successfully downgraded. You’re able to run any 2.60+ update EBOOT afterwards. And, another thing, if you chose 2.71 SE-C you can re-softdown to 1.50. Run the TA-082 executable again and select 1.50, boot into 2.71 SE-C “recovery mode,” and select the newly generated EBOOT.