ChipMonkey and Trunkybun - both your boys sound exactly like mine. Messy eating, can't ride a bike (his little brother is better than he is) has trouble with dressing/buttons and anything that requires the coordination of two hands or two feet.
I was interested to hear that you haven't had anything useful from the ed psych. Chipmonkey. We had parents evening this evening and saw the SENCO. We wondered about seeing an ed psych. as DS is supposed to have mild AS as well but we were told that she probably wouldn't have anything useful to add as DS is doing OK academically apart from his handwriting and other motor skills. I wondered if we were being fobbed off but maybe not!
Something I read recently, possibly on here, suggested improving handwriting by getting dyspraxic children to write on a slope with the paper at an angle so the school is going to try that. DS is not keen though as I don't think he wants to stand out from the crowd. Understandable I suppose.
However, with things like spelling writing is an issue as his teacher often finds his writing is illegible or he has attempted to rush and he has written something that looks wrong, but when he is asked, he knows exactly how the word is spelt. It is a shame really as it is holding him back.
Trunkybun - it just occurred to me but how about using magnetic letters to practice the spelling. That way he doesn't have to write but he doesn't have to say the letters out loud either. He can still focus on the visual as you would in reading. Don't know if anybody else has ever tried it and what the results were though.