[EarnestKS]

Brother can you please tell us why you "simply don't agree with" with the Shafi'i opinion of circumcision? Is your disagreement based upon Qur'an and Sunnah and not on your own aql and nafs?

I would highly recommend you to speak to some Shafi'i ulama and clarify your doubts before making such a change. If doubts persist, then speak to Maliki ulama.