1 INTRODUCTION  
2 OBSERVATIONS, DATA REDUCTION AND DATA PRUNING  
2.1 Observations and data reduction  
2.2 Kinematic substructures in GC systems  
3 ANALYSIS  
3.1 Tracer mass estimators (TMEs)  
3.2 Defining  $\alpha$, $\beta$, and $\gamma$  
3.3 Sensitivity of pressure-supported mass estimates to $\alpha$, $\beta$, and $\gamma$  
3.4 Quantifying the effects of galaxy flattening and GC rotation on mass estimates  
3.5 Quantifying the effect of kinematic substructures on mass estimates  
3.6 Total mass estimates  
3.7 Comparison of mass estimates with results from the literature  
3.8 Dark matter fraction  
3.9 Total mass and dark matter fraction beyond 5 $R_{\mathrm{e}}$  
4 DISCUSSION  
4.1 Dark matter fractions and galaxy models  
4.2 Total mass and dark matter fraction, with $\alpha \equiv 0$  
4.4 Correlations between dark matter fraction and galaxy properties  
5 CONCLUSIONS