One of the nice things about the Moisture Mirror product line is the building block pricing setup. Since 2002, when the Mirror II was introduced, Samuel Jackson has allowed gins to upgrade their Mirrors to a newer model for only the price difference between the two. This applies to all current models and any upgrade path whether you're upgrading from a Mirror I to a Mirror II (see example above) or from a Mirror I to a Mirror IV . With a Moisture Mirror you'll never loose a penny of your investment, so the decision about which model best fits your gin's needs is made much easier!