> 1 set of 3-rep max of each of the major lifts

Could you elaborate your training regime?

If you can do 3 reps of bench with 100kg-s, you do:

1. bar x 10, 2. 40 x 10 3. 60 x 5 4. 80 x 5 5. Then do 100 x 3

And then you move to squats and deadlifts with the same approach.

Is this more or less what you did?