you can if you want to, but i feel he’s still very young. Having spent a lot of money on OT and screening, the only thing that I feel the only thing that is really important to screen asap is vision if there are such concerns. If you think his vision is ok, just make sure he gets enough of the other activities promoting eye-hand coordination and strengthening the hands, and then reassess the situation every half a year. So see if there’s improvement by June, and then by November. Chances are there would be great improvements by then. See if the school provide guidance on this. Sometimes they are simply not taught properly in school on letter formation and spacing.