Maybe wait a little to see if you stop growing. I stopped growing at about 15-16, but it never hurts to make sure since it can be a waste of time and money. If you make it big so you can grow into it, you could end up not growing and have armor that's too big. Or you could grow super tall and...
I can't remember the name right now, but you could use transparent worbla or something like that, but you just heat it with a heat gun and becomes moldable.
Nevermind. Just remembered that you're vision becomes distorted with it.
Since my last chest piece's center started to sink, I believe I have come up with a great solution! I found a new chest pep file that has a backing on it so the armor isn't open and the interior can't be seen. So... this time I will attempt to fill it expanding foam. Although, the trick is to...