1 INTRODUCTION  
2 DATA AND YSO SAMPLE SELECTION  
2.1 HOYS data and photometry  
2.2 YSO sample in IC 5070  
2.3 Peak-to-peak amplitude determination  
3 SPOT FITTING METHODOLOGY  
3.1 Basics  
3.2 A Note on Notation  
3.3 Identification of best Spot Model  
3.4 Statistical uncertainties of best spot model  
3.5 Systematic uncertainties of spot properties  
3.6 Identification of Non-Spot contaminants  
4 SPOT PROPERTIES OF THE IC 5070 YSO SAMPLE  
4.1 Object categorisation  
4.2 Spot properties  
4.3 Spots and stellar properties  
5 CONCLUSIONS