Hi Gus
Have you tried playing LF on speakers as he's going off to bed? That would be less intrusive.
My son was diagnosed with learning disabilities when he was in Grade 4 and I found it helpful to hear the specifics on how he learns - auditory rather than visual, etc. Often kids with these attributes are very bright but have to deal with a fair bit of frustration in a school system which is linear, visual and far too slow-paced for the brighter ones - not to mention forcing them to sit at a desk for most of the day!
Would you consider getting him tested by someone who's really qualified and who thinks outside the box? Once they get to high school where there's so much else going on, it can be especially tough for these kids who are labeled 'difficult' and whose creativity can get them into trouble. Or maybe even find an alternative school? Here in Quebec, some of us ran an alternative elementary school for a number of years and my kids really benefited from that.
Anyway, I don't mean to preach. It's just that the way you describe your son, it's pretty clear that he has a lot to offer and it would be great to have him in a school which valued and understood him so he can excel!
Bhavya