US Patent 12122064 Method and apparatus for flattening boards

A portable board mill that includes a sled, at least one ski, and at least one alignment guide. The sled may include a first end, a second end opposite to the first end, and a longitudinal axis defined between the first end and the second end, wherein the sled is adapted to engage with a router. The at least one ski also is also selectively operably engagable with the sled at one of the first end and the second end, wherein the at least one ski is adapted to engage with a work surface. The at least one alignment guide also operably engages with the sled and is moveable between the first end and the second end.