Here are the Robot workbench icons, aligned to guidelines.
Old on left, new on right on light, gray and dark backgrounds at 16, 24, 32 and 64 px.
I had to make a few "choices" here - the stark black robot was treated by using a darker highlight tone than I usually would - I kept 2 levels of gray to ensure contrast as per guidelines, but it's still on the dark side for my personal taste. Any more though and it started looking very different from the original.
Also, the sunburst on "create new" would typically be in the top-right corner, but I kept it top left because a) that's what the original does, b) there's a blank space there for it and c) the idea is still communicated.
Note: All the Robot icons were at 16px, not 64. I'm running a test build to make sure nothing was broken.