This is the natural progression from the coffee table I built before. This large slab of beech wood is about 7 feet long and 3 ft deep on the left side (2ft on the right) and 2 inches thick. It was relatively dried out but unfortunately it was bowing from side to side and twisted as well. I ended up using the router sled to flatten the whole thing on both sides which took a whole weekend.
I filled in a fair number of cracks and knot holes with black dyed epoxy resin and inlaid a couple oak bow-ties along the largest crack. I kept the bark on the left side in the crotch of the wood and just coated it with lacquer which not only strengthened the bark but gave it a nice luster.
The base was built using 1″ metal piping which is custom sized to fit the odd shape of the desk and then painted a gray color with Rustoleum.
After I put it in place and began using it – I missed my old keyboard tray so I built one with poplar, matched the color with teak oil, and coated with polyurethane.
Preparing to build router sled to flatten this monster 
Finished details and final placement
Didn’t take long to add a sliding keyboard tray