Today I started off by cutting the upper left 4130 steel engine mount extrusion into 8″ & 1.6″ lengths.

I then trimmed the lower 0.1″ reinforcement plate for a final fit to the upper left engine mount extrusion pieces.

I then drilled the countersunk screw holes in the upper left extrusion mount pieces.

Here’s a shot of the 3/16″ countersunk screws mounted in the upper left extrusion mount pieces.

And all three 3/16″ countersunk screws mounted in the upper left extrusion mount pieces.

I then drilled the countersunk screw holes in the upper right extrusion mount pieces.

Here’s a shot of all three 3/16″ countersunk screws mounted in the upper right extrusion mount pieces.

Below are the 3/16″ countersunk screws & lower reinforcement plates in place on the upper extrusion mount pieces.

I then mocked up the CS105 control tube & test fitted it in place in the CS109 mount. With the CS105 tube moved inboard, the hole through the front seat will have to be widened just a hair in the area I’m pointing out with scribe in the pic below.

And did the same on the aft side with the CS105 control tube test fitted in place in CS118.

Here’s a shot of the CS105 control tube test fitted in place in both the CS109 & CS118 control mounts.

I then set the right side pilot arm rest in place, with the CS105 control tube test fitted in place.

I then did the same with the GIB armrest, with the CS105 control tube test fitted in place. Thankfully, the fit on both forward and aft right armrests are fine.

Tomorrow I plan to work on the aft left arm rest and then start back on the final canard & elevator install.