Board Thread:Questions and Answers/@comment-24826159-20160106183509

Does anybody have any ideas as to why post-dangai ichigo was so strong, as was easily overpowering aizen in his evolved state, also, im confused about the concept of FGT, it was stated that it was a technique in which ichigo turned into getsuga itself but what does that mean? is this just his shikai technique merely manifesting itself? 