We present extensions to the Ambisonic Decoder Toolbox to efficiently design periphonic decoders for non-uniform speaker arrays such as hemispherical domes and multilevel rings. These techniques in- clude AllRad, Spherical Slepian function-based, and modified mode-matching decoders. We also describe a new backend for the toolbox that writes out full- featured decoders in the Faust DSP specification language, which can then be compiled into a variety of plugin formats. Informal listening tests and performance measurements indicate that these decoders work well for speaker arrays that are difficult to handle with conventional design techniques. Additionally, the computation is relatively quick and more reliable compared to non-linear optimization techniques used previously.