The Municipal Services variant rounds out the group:
Before the U-23 was modified and offered for sale to the general public, it was utilized daily by construction and clean up crews around the city. On particularly busy garbage days, Freeman Robotics would deploy additional U-23's to speed up trash collection.
*****All available on Friday, March 14 at 10am PST*****
I posted a behind the scenes bit on the blog if anyone is interested:
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