This converted 12" BT3000 allows me to "mill" down over 300 linear feet of 4" x 15" beams that are between 6-15' long. At a true 4" my BT3000 won't rip on one pass, so I bought another from CL for $50 invested about $200 for the sled and rails, clamps etc and $35 for a 12 inch blade...
