It seems to me you have the talent to make a version that works on all firmwares, but you wish to earn from it instead of helping individuals with unbanning later firmwares or supplying them with console ids for 3.55 firmwares.
The thing is in my opinion, you would be much better off producing something that works on later consoles and accepting support for your efforts and perhaps supplying console ids instead. Wouldn't that make more sense ?
There are loads of people who need it, I would definitely be interested in having my console unbanned on Rebug 4.21 or later, but i don't want to run an app every time i sign in to spoof its too fiddly.
I'm not downgrading to 3.55. Whats the point of having 3.55 anymore ? The later firmwares are miles ahead.
some utter, explain why later firmwares are miles ahead? Just because people are too lazy to install game fixes? Keep in mind, if you don't have a flasher, you'll need one when your PS3 RSOD because that can't get fixed on 3.55+. Not everything works on 3.55+, you can't fix RSOD, you can't get to FSM, maybe this is one of those things.