1. INTRODUCTION

2. DATA AND OBSERVATIONS  
2.1. Cluster Data and Observations  
2.2. External Cosmological Data Sets  

3. COSMOLOGICAL ANALYSIS  
3.1. Scaling Relation Parameterization  
3.2. Likelihood Model  

4. ΛCDM RESULTS  
4.1. Cosmological Constraints  
4.2. Scaling Relation Constraints  

5. EXTENSIONS TO ΛCDM  
5.1. wCDM with BAO and SNe data sets  
5.2. ΛCDM with Massive Neutrinos  
5.3. ΛCDM with fNL  

6. SOURCES OF UNCERTAINTY  
6.1. ΛCDM Cosmology: Scaling Relation Uncertainty  
6.2. wCDM Cosmology: Scaling Relation and SNe Uncertainty  
6.3. Point Source Contamination  

7. DISCUSSION  
7.1. Improvement Relative to V10  
7.2. Prospects for Further Improvement  

8. CONCLUSIONS