Apologies for reviving an old thread, but DD14 just got her SAT scores back and I'm looking into this.
My take on this: You can use 7th grade SAT score for SET or DYS. Then discard it.
Can you share your thinking on why keeping scores would be a bad thing, especially if they're very good. I allowed her age-12 upper-1300's scores to be discarded, but upper-1500's at age 14 is above average for even the elite colleges and I don't see a downside. With so many applicants to elite schools in the ceiling range/mid-to-upper 1500's, I would think showing that ability at an early age could be a differentiator. Similar to differentiating among 780-800 Math scorers with high AMC/AIME scores.
A 1560-1590 as a junior supplemented with 1550-1570 in 8th grade should compare favorably to just a 1560-1590 as a junior, no?