You're welcome.

The issues with timed tests and masses of worksheets make sense, given his lower Cd/fine-motor speed score. You might also consider some fine-motor/occupational therapy evaluation, which is what I meant by perceptual-motor. Vision testing is reasonable.

He's actually too old for the WPPSI-IV. Other tests with comparable measures to check if that was a fluke score would include the WASI-2, Wechsler Nonverbal (WNV) and DAS-II.

...pronounced like the long vowel and first letter of the alphabet...