Maverick Gaming is actually based in Washington State. Their current Play Maverick set of slot cards shown below have logos for the Grand Z, Z and Dragon tiger casinos in Colorado. The also have casinos in Northern Nevada in Wendover and Elko along with a bunch of casinos or card rooms in Washington state. Here's a link to their website for more info...
Here's scans of the new slot cards... Blue, Silver, Gold and Maverick levels