McLaren Honda MP4/4 F1 Steering Wheel

Ayrton Senna's McLaren Honda steering wheel from the golden days of formula 1. It's almost a 1:1 scale but its made as big as possible to fit in a P1S/X1C. I forget the hardware I used, but you can choose to your liking. The smaller holes in the back that holds in the buttons are 2.25mm and the larger holes on top are 4.5mm. I believe I threaded them but anything that fits will work (you can even print them) as this is not a functional model. 

These were the last of its kind when F1 cars used round steering wheels and manual transmissions.