DS is coping fine, apart from the fact he is no longer allowed to sit with his knees tucked under which is frustrating for him. We are constantly following him around correcting it. Actually he just chucked a massive tanty because I won't let him do it! The physio suggested putting sweatbands around his knees to make it harder for him to sit like that, which I think I might have to do.
I don't have experience with hypotonia, but my DS2 is bow-legged, inward toeing and w-sits! He's never sat 'correctly' and we are having such a difficult time correcting him. I just wanted to say thanks for posting the tip from your physio! I'll have to try that