[12 piece bucket]

Aren't all accumulators basically connected? When you blast the left arm off your chest, your right arm has to straighten, which uncocks the left wrist. Only the 3rd accumulator doesn't have to be released when all the other accumulators are...

Correct . . . The release sequence is predicated on the left arm otherwise nothing happens.

So no matter what your procedure the sequence is

1. #4 Left arm moving down the chest
2. #1 The right arm unbending
3. #2 The left wrist uncocking
4. #3 The angle between the left arm and shaft is rolled through the ball