That's interesting, mawbroon. Is there anything that isn't associated with TT?
I was wondering because the SALT diagnosed DS with verbal dyspraxia, which sometimes (not always) goes with motor dyspraxia. DS dislikes walking & running and isn't a very confident climber when out of the house. He falls over a lot and bumps into things a fair amount. But he doesn't seem to show any other dyspraxia symptoms. He wasn't particularly late in crawling / walking etc.
Hats are okay actually - but I'm guessing they're part of the sensory thing. I do think DS has some sensory issues going on.
ds1's dentist, who is also an osteopath, said something about ds1's vagus nerve being affected. That would sort of explain why some seemingly random things are connected with the tongue tie and high palate, although I don't understand it all completely.