Hi Claire,
When you do small universe, you start the energy moving. It continues to move the way you start it moving, even when you drift off. As you come to, and are aware of being back, so to speak, see and feel that as a very gentle rejoining this flow of energy within small universe. Slowing the breath facilitates this gentleness or stillness. It doesn't matter where you rejoin. The coming and going is soft, with no observations regarding self judgement as to whether or not you are doing something, or doing something right. Everything is good. Come to focusing the mind to moving the energy when you are there and aware. Don't think about it. Don't think, " where should I rejoin". have the intention of this smoothness and join wherever you are at that very moment and continue.
It may be time to try it without the CD or tape. You go at your own pace. You can still hear Master Lin's voice and the sounds in your mind's eye. He will even slow down to your pace! The quietness of not using the external sound will be a nice variation of experience, and you might find yourself going deeper, via this quietness.
love,
gallen