In he link is some useful information to consider
http://blogs.myspace.com/index.cfm?f...ogId=519267158
What i teach and talk about concerning 3 finger use is to number the three finger being used as 1-2-3 or A-B-C or Blue, Red, Green or Bill Dick and Harry or what ever. This is so when in practice you can track the movement with the brain.
No matter how you do it one finger always follows another in a true 3 finger style. 1-2-3-1-2-3-1-2-3 is gallops not a true 3 finger style. So to look at it as numbers 1-2-3-2-1-2-3-2-1-2-3-2-1-2-3 each number follows the next so each finger in theory follows the next no matter where you start so the sequence is always the same. A starting point is just a mark you give it. That then brings the brain in to the equation because now you have to order the fingers the way the brain wants them regardless of any physical ability required.
To help with this i number the fingers
1 for the starting finger
and for the middle finger
2 for the following finger.
This allows you to count 1 and 2 and 1 and 2 through any exercise. It allows the brain to know which finger is where, it helps as it is a timing count as well. You in effect count rounds rather than alternation or backwards and forwards.
In an C scale you would play up to the octave and down twice to arrive back at the starting finger. The "and" plays the same notes though out, it is the fingers either side that change you are in effect dividing by three each time you play but feel the count as being in twos because one two is the only numbers you say. The brain accepts the "and" as being part of the counting but does not let if interfere with the execution of the physical.
Have fun with it as it is just about getting the brain on board then time and practise will sort out the physicality.