stronger private key encryption?

Great tool, thanks! Love that it can be used offline on a chromebook, factory reset, in guest mode, in a browser, loaded from a thumbdrive, and that it has the file import/export function.

I would like the encryption around my private key to be as strong as practical. This is for a very high-value, but very rarely used, private key. I don't care about size or speed.

From this tool: $ gpg --verbose --list-packets ~/junk/0xB4A67CAD-sec.asc | grep -e iter.salt -e count gpg: armor header: Version: Keybase OpenPGP v2.0.76 gpg: armor header: Comment: https://keybase.io/crypto iter+salt S2K, algo: 9, SHA1 protection, hash: 8, salt: AE0B2E0F024269C8 protect count: 65536 (96)

How can we make the s2k options configurable, maybe something like these?: --s2k-cipher-algo AES256 --s2k-digest-algo SHA256+ --s2k-mode 3 --s2k-count 65011712

Thanks in advance.