1) If I flash to a DB NEC 2500A firmware can I flash back to original?
2) I suppose the RC1 with unlock would be best? I'm mainly concerned with unlocking the speed, but want the flash that works best.
3) And thirdly and most importantly, if I had to flash back to original and had to return it, could the retailer or manf. tell I flashed a hacked firmware before? This is a technical question, not an ethics question.