Stretch goals reached!
We've reached both stretch goals! I was delighted to hit the first goal, but then to hit the second so quickly afterwards was amazing and quite unexpected. Thank you all so much for your support.
I will give careful thought to adding another goal. It would have to be something that won't take much extra time so it doesn't throw out the project schedule, and won't add to the weight of the pledge rewards too much so that shipping costs are still valid. I don't want to risk the shcedule and have to push the release of the book back, so it may be best not to add another stretch goal.
All limited rewards have now gone. Unfortunately I cannot add extra rewards for sketches as the time involved could also risk the schedule.
It really is fantastic to see how far the project has come in such a short time, and to know that my little robots have so many friends. Thank you once again!