Before starting the spar I cleaned up the area that I'd worked on and glued yesterday.
Spent way too much time trying to build a temporary work table to build the spar on. I set up some sawhorses and tried to shim them into place so that they were even and level without any twist. I had a couple of steel framing studs to build a flat, continuous table top. Because of the potential movement of the sawhorses it just wasn't working adequately.
Looking at my workbench, I realized I could make it work. It was certainly long enough, and if I located the work area properly, I'd still have full access to my tool boxes on the bench top. Sighting down the workbench I could see that it was straight and level. Putting a digital level on it confirmed that there was no twist along the length of it. Sooooo, after all that work trying to level and stabilize the sawhorses, the work bench it is.
I set the steel stud open side down on the workbench and then stacked with alternating joints, two layers of 3/4" MDF on top of it. I'd cut the MDF into 6" wide strips to give me a smooth table top that I could build on and clamp to.
Again, out with the digital level and checked. A-Ok. I'm now on the right track.
So, with little fanfare and not a lot to it, I laminated the top two layers of the main spar. I spread thin epoxy on the mating surfaces of the boards to fully wet each side, then I spread on some more epoxy with high strength flox mixed in. This mixture is to take up any minor gaps in the surface. Then I started clamping. I would have liked to have more clamps but I'm sure that it's fine.