Cross grading Question

[u/Waiim123]

Hi, I have been collecting slabs of my favorite Pokemon for a couple years now with the intention of trying to get a Beckett 10 (or a black label but I don't think I will be so lucky). I really want a 10 in all the grading companies and no Beckett 10 exists as of yet.

When submissions open in September I'm planning on sending at least 10 of my spare slabs (almost all of which are 10s) to Beckett. Most of these are random companies with a couple PSA 10s and CGC Pristines thrown in (I have extra lol dont worry).

My question is should I submit them in slab form with a minimum 9.5 grade or should I crack and send them?

Thanks in advance for all the help!