Flat Bottom Steering Wheel DIY

I've amassed quite a collection of Supra and is300 steering wheels over time. I've had one in my truck for quite a while, but the fanciest part of it was a fresh leather wrap. Some time after becoming accustomed to steering wheel buttons, I started to want this in the truck. Since the is300 steering wheels have buttons, I figured I could modify those buttons (intended for the e-shift transmission) to work as radio controls. While I was at it, why not find a way to make it into a flat bottom wheel? I further postulated that it might be possible to use the connectors for the cruise control in order to have a steering wheel mounted push start button. Of course, why go this far and not throw in some carbon fiber?
So, that is how I went down the rabbit hole of building a fully custom steering wheel for the truck. Here's hoping it all works lol. Follow along and find out for yourself!
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Disclaimer:
Due to factors beyond my control, I cannot guarantee against improper use or unauthorized modifications of this information. I assume no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. I recommend safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond my control, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not myself.
Steering wheels are safety critical components of a motor vehicle and manufacturers spend millions of dollars on their design, safety/performance testing, and manufacture. Even changing the leather on one alters it from its as tested/as validated configuration and means that it may not perform as intended in regular use or an automobile accident. If you undertake modifying one, you do so at your own risk!