Actually, I would have the same suspicion that the same underlying condition is responsible for the fine motor, speech, and vision issues. They all appear consistent with the ligament laxity and low muscle tone. Artic/speech dyspraxia are both not unusually found comorbid with fine motor issues. Some kiddos have motor planning issues, which play out in those ways in the respective systems.
But then again, what would you do differently, if you knew for sure that it was one cause? You'd still work on hand strength, cueing him to use his artic strategies, and plugging away at typing.
