What in particular are you struggling with? Here are a couple things that I remember helping in the preclinical direct course: Putting a little bond on the plastic instruments can help prevent sticking. Overbulk a bit so you have room to polish down. If you end up with little voids around your margin, put a little bond at the void and cure it, should clean it up. Certainly practice makes a huge difference, too. Direct is a very tough A, but it's doable. I ended up practicing each practical, start to finish, at least 2-3 times beforehand.
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