The diorama on the assault to the breach of the La Trinidad bastion is now finished. His author, Curro, is currently exhibiting it at the Museo Luis de Morales (Sala de las batallas) Plaza Santa María, 2 - 06002 Badajoz (Spain).
You can see a lot of wonderful pictures, like the above ones, at Google+
Enjoy this masterpiece!
Edited (23/April/2012). Last news about the team behind the diorama. According to Curro himself (see the comments below) three of the members of Recreaciones Historicas en Miniatura, Maximo (a.k.a Curro), Pablo and Miguel, have started a new commercial adventure named Modelismo Profesional de escenas históricas,