On Rafael Martinez's youtube page he goes through an entire interview with Kevin McCurley of NERD. In that video Kevin explains his whole experience with breeding spider x spider, including the pearl project. From what I remember the overall outcome was not very good and he advises against it. I believe the youtube page is Massachusettsballs or something of that sort? I subscribed to it on my youtube channel. The link to my channel where it can be found is below if you are interested. He also goes through his numerous experiences with "failed" projects. It's a very interesting video for sure. If I were to take anyone's advice about it all it would be his.