For me, using rockbox on Fuze/Clip is complicate what is simple. Besides, I prefer the sound signature/SQ of the original firmware. In flat, Rockbox is inferior in terms of SQ, compared to the original firmware.
And I do not have much patience to deal with the zillions of options in Rockbox... :o)
x2 . the original firmware is simple , just what i need
btw. nice to meet people from brasil , im from argentina