Have you read this tread from a couple of days ago
http://www.crafts-beautiful.com/site/index.php/forums/viewthread/5159/
Also try this one and watch the video
http://flourishesnewsletter.blogspot.com/2007/12/using-nestabilities-in-your-cuttlebug.html
I would also like some nestabilities and use them in my CB but I have read so many varying reports, I don’t know what to believe. Some say it works fine without the Spellbinders tan mat, others say it doesn’t and they have either broken their CB or some of the plates trying to use them. I have also read that you should NOT use the black mat that is being sold on e-bay and other places as this definately breaks the CB.
I did however see these the other day :
http://www.cuttingedgecrafts.co.uk/cart.php?target=category&category_id=542
Would like to know if anyone has used these.
Good luck in your quest of finding out. I wish I was brave enough to buy some and then try them out.