Chapter 1 preparation tips on proper balancing, No counterweight, A 1.0kg (2.2 lb) counterweight – Vixen Sphinx SXP User Manual
Page 18: A 1.9kg (4.1 lb) counterweight, A 2.8kg (6.1 lb) counterweight, A 3.7 kg (8.1 lb) counterweight, Two 3.7kg (8.1 lb) counterweights