Does anyone use more than one betting method/system?

I've developed about 7 in total in the past two years. Currently using 2. Will commence with 2 more next week.

These four are:
1. Method for 1000-2000m races.
2. Method for 2100m+ races
3. Roughies Method for all distances.
4. Trifecta Method using the above.

Dividing up races by distance is based on the idea that stayers have slightly different characteristics than sprinters/mid distance horses.