Well, I was really concerned when i saw some sort of stretch marks, well not really stress marks i guess since its not a different color, but it was enough to scare me from transforming it. However I finally managed to gather up the courage to transform it last night, actually two of them back to valk mode.. phew what an ordeal. Luckily nothing is broken and the stretch mark looking thing is still intact. Dodge a bullet there.. phew. I do have an OS that has remained in valk mode ever since i've read people's issues, I was looking ot get the combo but will definitely wait until i get some good confirmation on its durability.