Just wondering how to control the variable X using a radio button (bar) in Manipulate because it appears to not be working. If anyone could help, that would be great!

Manipulate[ {evals, evecs} = Eigensystem[( {  {-\[Sigma], \[Sigma], 0},  {r - X[[3]], -1, -X[[1]]},  {X[[2]], X[[1]], -\[Beta]} } )];  GraphicsColumn[{Show[VectorPlot3D[( {     {-\[Sigma], \[Sigma], 0},     {r - X[[3]], -1, -X[[1]]},     {X[[2]], X[[1]], -\[Beta]}    } ).{x, y, z}, {x, X[[1]] - 2, X[[1]] + 2}, {y, X[[2]] - 2,    X[[2]] + 2}, {z, X[[3]] - 2, X[[3]] + 2}, Axes -> True,   PerformanceGoal -> "Quality", AxesLabel -> {"x", "y", "z"},   Ticks -> None], If[evecs == Re[evecs],  ParametricPlot3D[Evaluate[t evecs], {t, -3, 3},    PlotStyle -> {{Thick, RGBColor[0.5, 0.21, 0.36]}}], {}],  PlotRange -> 1, ImageSize -> {275, 275}]}], Row[{Spacer[60], Dynamic[Style[Text@TraditionalForm[HoldForm[( {         {x},         {y},         {z}        } )' == Dynamic[( {          {-\[Sigma], \[Sigma], 0},          {r - X[[3]], -1, -X[r, \[Beta]][[1]]},          {X[r, \[Beta]][[2]], X[r, \[Beta]][[1]], -\[Beta]}         } )] ( {         {x},         {y},         {z}        } )]], Medium]]}], Delimiter, {{r, 1, Style["r", Medium]}, 0, 20, .1, Appearance -> "Labeled"}, {{\[Beta], 8/3, Style["\[Beta]", Medium]}, 0, 20, .01,  Appearance -> "Labeled"}, {{\[Sigma], 10, Style["\[Sigma]", Medium]}, 0, 50, 5,  Appearance -> "Labeled"}, DynamicModule[{X},  RadioButtonBar[ X, { {0, 0, 0} -> "\!\(\*SubscriptBox[\(C\), \(0\)]\)",     Dynamic[{Sqrt[\[Beta]*(r - 1)], Sqrt[\[Beta]*(r - 1)], r - 1}] ->   "\!\(\*SubscriptBox[\(C\), \(+\)]\)",   Dynamic[{-Sqrt[\[Beta]*(r - 1)], -Sqrt[\[Beta]*(r - 1)],     r - 1}] -> "\!\(\*SubscriptBox[\(C\), \(-\)]\)"}]], {evecs, 0, 1, ControlType -> None}, {evals, 0, 1, ControlType -> None},  Dynamic[Graphics[{PointSize[.04], RGBColor[0.5, 0.21, 0.36],  Point[{Re[#], Im[#]}] & /@ evals},  PlotRange -> {{-3 - Max[Abs[evals]],    3 + Max[Abs[evals]]}, {-3 - Max[Abs[evals]],    3 + Max[Abs[evals]]}}, Axes -> True,  AxesLabel -> {"Re(Z)", "Im(Z)"}, Ticks -> None, ImagePadding -> 33, ImageSize -> 250, PlotLabel -> "Eigenvalues"]], ControlPlacement -> Left, AutorunSequencing -> {1, 2, 3, 4}] 

I want to be able to select between the three X values and have the axis of the VectorPlot3D and the {evals, evecs} adjust as X varies.