eaglesgift
500+ Head-Fier
I really don't think they would honour the warranty seeing as you've put 3rd party firmware on it.Wow, seriously that bad to consider applying warranty? I purchased it on november of last year from gearbest, but since I'm from México I guess it will be a real pain in the @ss to try to make that warranty valid, but I think there aren't many options left.
That or just hope for anything bad wents wrong with RockBox
If you like rockbox, Im not sure what you're worried about though? Why should rockbox go wrong in the future and if it did, you can reinstall using their utility right?