I'm starting an Imperial Grot army of my own, and drawing quite a bit of inspiration from yours. I've been searching the web for examples to draw from. Although I find a fair number of people mentioning rebel grots very few of them have many pictures. Yours is by far the most complete collection I've been able to find and amongst the highest quality.
Do you mind if I ask what bits you used for the Groundpounders? Is that a standard goblin with Cadian arms?