Finishing the legs

 Next, using shims under the legs, I level the seat from side to side and from front to back. Once it's leveled, I mark each leg using the bench top as a reference, so that the seat will tilt the desired amount from front to back. Around 1 inch is comfortable. The legs are then sawn off at these marks.

Measuring off the bench top

Legs sawn to length

An upside down plane is clamped in the bench vise

The legs are run across the plane blade until there's no wobble - note the chamfer

The plane is at the same height as the bench top - it's easy to make tiny adjustments this way

Each leg is carefully sliced across the blade - the chamfer helps prevent tearout

Testing on my table saw top which is very flat