Check for the thread on the H. mag. Someone cut theirs and fragged it. You can do it and it would probably be much easier with a GBTA than a mag.
Also I have noticed that it seems the RBTA split like crazy while the green ones don't split as often. I would suggest you try and cut it.
A large blade would be best, but the person who cut the mag used scissors, which tear a lot more tissue than necessary, but where the only thing large enough they had to cut theirs.
Hope this helps, good luck. I would try and document the process for the better or worse.