Average for symbol search is still substantially below his GAI. It also represents a notable, nearly 3 SD difference between the motor-involved (coding) and motor-reduced (ss) subtests of the PSI. (I assume his coding score, based on 6 SD being the entire range of the test.) Has he been evaluated by an OT?
I second investigating both vision and fine motor.
Whether OT can sufficiently remediate any fine motor issues depends a lot on the reasons for the deficits, and the presence or absence of other interfering factors. It's likely worth a try, though.
I gather that actual visual spatial ability appears to be unaffected, though, as his block design must still have been quite strong to result in a GAI at the 99th %ile.
