Finally finished!  Tabletop dimension is 42" x 96".  Tabletop is two pieces aligned with dominoes and held together with dogbones.  It's high-gloss, but after the varnish cures for a month or so, i'll use wax and 0000 steel wool to rub out the finish, and it'll be more like satin.

This is where all my big projects start -- Fusion 360.  Leg angle is 10°.  Truss angle in center of the table is 45°.

All douglas fir 4x4 from Menards.  Run through the jointer & planer to clean them up.

Filled all checks & knots with 2-part epoxy.  I use West System.

First end done.  All joinery done with Festool dominos.

I wanted the table to be able to be easily disassembled in case we ever move.  I joined the horizontal stretchers to the ends using stair railing zip bolts.  These worked great.

How the horizontal stretchers are joined to the end.

Looking down on the horizontal stretcher.

Table and bench bases complete.

Bought the tops from a local lumberyard that will perform all milling and gluing.  The tabletop is two pieces to make moving it around easier.

Picture showing all the dominos and dogbone milling.

I used timbermate to grain fill the Walnut prior to finishing.  I mixed 4:1 Ebony:Walnut.  Wanted the darker ebony color to accent the grain and pores.  Lots of videos on YouTube on how to use this stuff.  It's kind of a pain to get it to dissolve all the way in water, but with enough stirring, it'll eventually mix up.

Benchtop with timbermate applied.

Tabletops with Timbermate applied prior to sanding.

Garage setup for finishing.

I used Arm R Seal, gloss.  I think I did 7 coats, wiping it on very thinly each time.  Usually waiting 4-5 hours between coats.  Sanding with 600 grit very lightly between coats.

Closeup of the grain showing the dark timbermate in the pores after first coat of varnish.

Another closeup of the grain.

Used biscuit cutter to cut slots in the bases for table top fasteners.  These allow lateral movement if the top moves during seasonal weather changes.

This is how the two peices of the top are held together.  These zipbolts have a geared nut on one end that makes them really easy to use.  Far better than traditional dogbones that required you to put a wrench in and only get about 1/8 of a turn at a time.

I always wax screws prior to screwing them into hardwood.

Tabletop fasteners.