Congratulations, snowbird. That's as neat and clean-looking a build as anybody could hope for. Great seats too. There is one thing though that looks like it's not going to work right.
I wrote in a different post once about the use of pillow blocks in kart builds, and how great they are. A warning was mentioned about the "self-aligning" description given about those bearings. Wrote about how it's true that you don't have to line them up perfectly, but do try to get it close because they're not universal joints. Every bit of that was written concerning their use on axles and jackshafts, which means of course that there'd be at least two bearings involved on each application.
While your rack's input shaft is rigid and fixed, your steering shaft is not. You've only got a single bearing on it, and it's one of those sloppy stamped-out-frame ones at that, not the cast-iron ones in that previous post. Since that's not going to be a machined-fit race in the bearing, but rather a "self-aligning" semi-cushioned one, it's going to move around on you. You'd find that when trying to bounce along on any uneven surface, the forces arrayed against the steering would be strong enough to jerk the steering wheel all around in your hands, unpleasant and maybe even a little unsafe.
One more bearing anywhere between the steering wheel and the rack would get things to where you'd be happy about it. The best spot to rigid things up would be on the same shaft connected to the steering wheel as the one that's there now. However, a rigid mount somewhere along the intermediate shaft would also serve to improve rigidity, with only a little play in the wheel.