We have seen Dewet at DPO for my son's cranial helmet and he has been so great.
He is very patient with our 6 month old to do fittings and checks. We have called and been in more often than normal, to have the helmet checked/refitted/trimmed due to growth spurts and the whole team has been nothing but accommodating to our needs and requests.
Highly recommend DPO for cranial helmets.