Setting another polymer clay cabochon

I need a bit more practice with making bezel settings. I am getting much better at the first steps, but am not happy with the results of using the pusher and burnisher. The final result looks crinkly and unprofessional. So I'm setting another polymer clay cabochon that I made a year or so ago.

The cabochon is identical in shape and size to the one featured before because I used the same mould to make it (pictured). I think I bought mine from here. The cabochons are relatively easy to make following the instructions that come with the mould. Most of the effort goes into the finishing using various grades of wet and dry paper (used wet).

Here are four pictures taken during the setting process.The first three are in the phase when using the pusher, the last one (bottom right) is after some work with the burnisher. I am finding these photos very useful. They show up irregularities that I don't notice by eye - that little notch on the right hand side for example. I should have removed it before stating to push the bezel.