Turn a cosignatory account to a multisig account

Hi everyone,

I currently have a cosignatory account with over 10k vested balance.

I want to turn that account into a multisig account for increased security while it delegates harvesting.

Will it be possible to do it right away or should I first remove it from my cosignatory list?

Will NanoWallet allow me to turn it into a multisig account while it’s still a cosignatory account? And in that case, will it be able to sign transactions for the account its a cosignatory for?

Thanks!

Just saw that NanoWallet will prevent this scenario from happening by showing the following:

I don’t think cosigner can be multisig account because multisig account can’t initialize transaction and you required it for cosigner.