Implement deep circuits beyond depth of 8

Hi team. I was recently experimenting with the library and encountered this line of code - https://github.com/apple/swift-homomorphic-encryption/blob/d2edf904a30c5b6fbd5bb64e7096702e3d9986ee/Sources/HomomorphicEncryption/EncryptionParameters.swift#L141 This limits the no.of primes in ciphertext moduli chain to 8. Is there any reason for that? Also, how can I possibly implement deep circuits with this constraint after rescaling with each multiplication?