Please note: this is a work in progress — there will be changes, especially once I submit artwork to the enamel pin manufacturer. Below are the original pencil sketch, vector artwork, and a simulated enamel pin sampler.
These are only being shown here to give some insight into the process and let those interested know what's being worked on next (+ hopefully have a little bit of fun.)

A few of the changes so far: The lower legs of Murf•Bot were thickened to better visual balance with the forearms. The scissors on top were relocated, since the two holes in the scissors would cause a problem with the enamel mold — and there's a better color balance now with the scissors planted in the "nether regions." 
Not shown here: I've also reduced the threading on the screws and enlarged several fill areas, making it easier for the manufacturer to fill them accurately.

I'll also mention that the bread in the top toaster slot might be an issue due to its 2-color demand and placement on a few designs. Once I talk to the manufacturer, the bread might be dropped from almost all the pins. 
We shall see, and I will let everyone know.