Very Cool. Real pretty design.
I would've suggested a tang on the leftside rear for a linear steering damper. The Paralever lever already has a location for the other end of the damper so if you put the tang on it would be easy to drill the lever and install a damper. Would it be possible to program that in?
Another point: From the looks of the last pitcher post, the top of the clamp has pockets milled into it that feed into the clamping area to the sliders. This could cause corrosion problems if dirt and water settle in there and are left for much time. No suggestions other than closing the pocket off before the slider clamp to avoid fusion of the slider to clamp.
Again, good lookin' stuff. I would R&R the ball joint myself...