As for the body rigidity parts, the lower arm and floor crossbar are already installed in the rear, and then the strut tower bar is installed in the front.
Even so, I felt fluffy in the high-speed cornering around the rear and the anxiety of the car body in the high load range, and I wanted to get rid of this, so I decided to make it a center floor bar after worrying about whether to put a motion control beam and a lower arm in the front. ..This was a great answer because it fits my needs perfectly.

Riding on the sidewalk and twisting of the car body on the up and down of the U-shaped slope that I had been worried about for a long time were within my tolerance.
The limit of S-shape has also risen, and the fun has increased.
Because it is located in the center of the car body, it feels just right at high speeds, probably because the front and rear ground contact is improved, and the light steering wheel feels a moderate weight.

As a side effect, on a slightly rough road surface in the city, it was noisy because it resonated with the go, but as the slight vibration was attenuated, the go noise became quieter and less noisy.
Also, when it was normal, I was worried about the chattering noise of the glasses holder on rough roads.It seems that the front is relatively hard and sounds.
When I put in the center floor bar this time, it stopped ringing even on the rough road surface that was ringing.