R.M.
I have a little guy whom diagnosed with tort as well. However, it has not been suggested to do a helmet. When he was diagnosed, I had done a lot of research and learned about the helmet. I would take the helmet.
As well, I work with a little girl who was also diagnosed with this who did not do the helmet. It continues to effect her at the age of 4 with her balance, walking, running, and she continues to receive PT for this.
Take this opportunity and help her now to save the troubles in the future! Good luck-you are a great mom to be looking into this!