Really a nice image and a great comparison. These remind me of the small candies that I used to see at the confectionary many years ago as a small boy but without the spines of course.
The methods called studied neglect Bruce! I just stuck them on the top shelf of the greenhouse in full sun and left them. Friends who have tried this have "fried" theirs, so with the greenhouse being quite high I must have quite a good air circulation, though this shelf is up near the eves.
As you will note I also left them in the pot they were sown in without pricking them out yet. They seem to grow quicker if crowded!