Minimus Differentials 12 Changes Per Lead Bell Methods Ayston Differential Minimus Minimus differentials (12 changes per lead) Lyndon Differential Minimus Minimus differentials (12 changes per lead) Reverse Tinwell Differential Minimus Minimus differentials (12 changes per lead) Ridlington Differential Minimus Minimus differentials (12 changes per lead) Tinwell Differential Minimus Minimus differentials (12 changes per lead)