That looks OK. A minor point might be to focus, as the Buddha does, on 'experience' and not whether something 'exists' or 'does not exist'. The five aggregates are the sum of experience, and all aspects of experience are not-self, impermanent, and unsatisfactory. The Middle Way of the Buddha transcends notions of 'existence' and 'non-existence' (see SN 12.15 for details).
"Having understood name-and-form, which is a product of prolificity,
And which is the root of all malady within and without,
He is released from bondage to the root of all maladies,
That Such-like-one is truly known as 'the one who has understood'." (Snp 3.6)
"Whether I were to preach in brief, Sāriputta, or whether I were to preach in detail, Sāriputta, or whether I were to preach both in brief or in detail, Sāriputta, rare are those who understand." (A I 333, Sāriputtasutta)