SetProtocol has two issuance modules: basic, and NAV. In order for NAV to work, all tokens within the set need to be supported via the protocol's oracles. Since none of the NTF Index tokens have oracle support, no one would be able to issue or redeem set shares once we have deployed our trades. For basic issuance to work, a user will need all of the Set's components in the proper ratio to issue MUG tokens. This requires multiple approvals and defeats the purpose of having a Set in the first place. However, it will allow MUG holders to exit their position for the underlying tokens if they so wish.