The antminer s9i achieves slightly better stats than the s9 but uses the same hardware. Is their a way to put s9i software and firmware on an s9? Also I am used to the Linux operating system and flashing images etc. Would I be able to do this myself?
You need some software engineer to do so. Because its like installing a different IOS version on iPhone. You can do it but you need someone from Apple or an expert to do that. anyway, after all, you would save only 1$/m extra since the new software saving 20 watts less than s9 software that's the only difference.