Tygr, I appreciate the info about SDs. We got our test results, a little higher than I expected, but not way out there. Was nice to get some professional confirmation of some behavior issues - perfectionism as well as some attention issues that tend to aggravate the classroom situation. I have a few questions I'll probably post under the testing forum.
Thanks for the reference to NAGC - I'd seen that site before, but not dug in too deeply - I'll go back to it.
We will indeed keep on down this path. DD6 needs the intervention and I need to be prepared for DS3 coming up behind - at least he will get the benefit of my experience since I think we'll have similar issues. His issues will be blending and underachieving though rather than disruption, I think.