This shows the basic router sled design and build. The 4 L-angle aluminum parts are 1"x1"x48" and cost about $16. The stainless steel fasteners and playwood I had laying around.
The slab comes from the shores of Lake Superior in Michigan’s Upper Peninsula. My friend Kevin cut it with a chainsaw.
The initial moisture level was initially over 25%. The after milling into rough lumber, it will sit drying in the shade for a few weeks until the moisture is down to the 8-9% range.
I used a small router but was still able to mill about 1/8" off for each pass.
About 2/3 of the slab was thicker so I cut it into two parts and milled the parts separately. Next I used a track saw for the first cut to create a flat edge, and finished cutting on a table saw.
