I used the Kreg Universal Bench 20″x20″ with standard height legs. I also used their locking casters. Top is 4’x2′ MDF cut in half and glued together.
Kreg Universal Bench: https://amzn.to/2NZNdxM (Amazon Affiliate)
Portalign Style Drill Guides: https://amzn.to/35fwI6I (Amazon Affiliate)
3/8-16 bolts: https://amzn.to/2CVxcTb (Amazon Affiliate)
3/8-16 nylon nuts: https://amzn.to/2OoCRXf (Amazon Affiliate)
3/8 washers: https://amzn.to/33Uv5uN (Amazon Affiliate)
3/8 Drill Bits: https://amzn.to/2pt4xli (Amazon Affiliate)
Kreg KMA2900 Multi-Mark Multi-Purpose Marking and Measuring Tool (Amazon Affiliate)
US: https://amzn.to/2AaEgLL
UK: https://amzn.to/2Rjg1Si
CA: https://amzn.to/2Np0Ci4
ES: https://amzn.to/2VWPqh8
FR: https://amzn.to/2Z5uVk8
IT: https://amzn.to/38Ihie8
DE: https://amzn.to/2ZJm2fm