Having only just seen the "with wheels" pic, it strikes me that Binky is coming out slightly wider than your average Mini 1000...
Given BOM haven't been shy of buggering about with (up) the steering geometry, did you give any thought to reducing the track?
Clearly this approach would have given rise to much rampant fabrication (and would have served to further delay Ep11), hence I'm perplexed as to why you didn't elect to go down this route.