Hi Dave,
I'm interested in the little purple gizmos you have holding your servo in place. You mentioned them (blue bird) above, but can you provide a specific link for them? I'm finding that tire tape is just not holding the servo in place like it should and something like those braces looks like just the ticket.
Would these still work if the servo is mounted opposite to yours with the horn towards the rear?
Also, could you provide some more detail shots of your ball linkage arrangement and a parts list for it?
Thanks much,
ianc
P.S. Get some tires on that thing; I guarantee it will have more grip!