I have the 2GB version but I doubt it would brick the player as you can gain access to the hidden partition and you can reload the raw uncompiled firmware to recover BUT do so at your own risk.
I had the T50 firmware loaded and as it was running smoothly I decided to put on the S:flo firmware and change the start up and close down graphics, that was a couple of hours ago and I can now say that it runs better with the Teclast firmware plus you get the ebook text to speech ( TTS ) with the T50 firmware.
I was amazed at the quality of the .FLV videos, they play better on my player than on my laptop.
Oh, did I mention that there is no unwanted noises at the end of the tracks and no stuttering.
I read somewhere that someone with a Meizu M6 SL said that the T50 music quality is the same, well it should as I believe it is using the same chip.