I will give an overview of recent theoretical and numerical calculations of confined magnetic mirror plasmas with the goal of creating a break even class axisymmetric mirror (Forest, JPP 2023). Fokker Planck solutions from the CQL3D code combined with magnetic equilibria tracking anisotropic pressures and self-consistent ambipolar electric fields provide the starting point as an initial condition for stability analysis. Hybrid VPIC is now being used to model both MHD and kinetic stability and GKYLL fluid and gyro kinetic approaches are not far behind. Major challenges for the mirror and building a digital twin will be discussed.