Flattening Slabs

[tekoah]

How do you all flatten slabs once they are dry? Awhile back I built a homemade router sled and it does well for me. Here is an oak slab a little over 8' long and up to 48" wide. Pictures are right after flattening it. I will post some more recently flattened slabs.

 

[tekoah]

Oak slabs

 

[tekoah]

Camphor

 

[Eduardo K]

I think a router sled is probably the most precise way short of a CNC. I've had good results in the past using an old no4 jack plane thats set up as a scrub plane, then following it up with a no5 jack or equivalent low angle plane. It's slow and provides a satisfying escape.
What size router do you use (hp), size and type of bit, and how deep can you go on a pass? I like the table setup.

 

[Guido Salvage]

A router sled is the fastest method that I know up.