[Mal Bridgeman]

I would follow the advice of choose a method and stick with it. If you think one day you might do GUE training then I would go for that method.

When I did my initial TDI training with Mark the sequence and technique was different.

1. Close Isolator
2. Close RH post (don't breathe down)
3. switch to backup
4. Clip off primary
5. Open RH post
6. Close left hand post (don't breathe down)
7. Unclip Primary
8. Switch to primary
9. Open left post
10. Open Manifold
    
11. Flow check

The GUE one is well described on the Team Foxturd pages and as I understand it the primary difference, other than sequence, is that GUE will attempt to fix a faulty 1st stage so the dive can continue, whereas the TDI method seemed aimed at training you to secure at least half your gas to perform your ascent.


HTH
Mal