Just got this from a Dad today regarding the GT4 Steering wheel mount.

Hey there Mr. Mallory. I found your writeup on your website about your steering wheel mount. My 10 year old found one of those really expensive seats/mounts and was gutted when we say how horribly expensive they are. I am not very good with wood, but I thought I'd try to make something. Your design looks great, especially the way it's adjustable. Thanks so much for publishing online all the info!

No problem man, hope it goes well (I'll ignore the Mr. part ;-) )

Ironically enough, I haven't used the one I built for over a year so I ended up trashing it the other weekend.