Hi Curious1:
Only if you have worked through Level 1 and 2 for a significant period of time, then I would recommend strongly getting the sun and moon meditation CDs even if you have not had the Level 3 class yet. They are very powerful as you are actually bringing the sun and moon energies inside your body during the mediations. The sun and moon energies are quite different and while the meditations are similar, they are different so you need to be attentive to the differences. The meditations are also longer... last about an hour each. You can follow along on Master Lin's instructions on both CDs as he talks you through the meditation clearly. In fact, I think it is best to do these meditations before you go to the level 3 class so that when you do go you will be familiar with the routine and will be able to absorb much more from Master Lin and the other students. I also find both of these meditations to be more conducive to going into the emptiness while the small universe and even the focused concentration are more for opening channels, building a sound energy base and healthy physical body.
May the sun shine in you!
Agent B