STANDARD Slab Flattening Router Sled & Rails – stuff2makestuff
Router Leveling Jig | Woodsmith
Flattening Wood Slabs with a Router Jig
Router Sled Hardware Kit - Lee Valley Tools
Router Jig Turns Stumps into Beautiful Side Tables - FineWoodworking
Slab Jig (Router Sled for Woodworking) Levels Wood Slabs Up to 64 Inches Wide! Portable, Durable, and Easy to Adjust (Stone Coat Countertops) - Walmart.com
Flattening Sled Plan from WOOD Magazine
PRO Slab Flattening Router Jig W/adjustable Height Free - Etsy