I tried to dye the hair. but whatever new material they use doesn't dye at all.
I did get all her hair removed, though.
I tried to cut the wings out to remove her tail but they wouldn't come out..so I tried to cut her in half but she was too hard.
I used a dremel to dremel the tail out of the hole. It seems the g4 reboot alicorns are actually solid plastic, looking into the tail hole there's just enough space to fit in the end of a tail, then the rest is solid.
To remove the hair I cut out the neck plug and scraped the glue loose with a clippers then pulled it out with a tweezers.
Over all, these are the hardest to customize yet.