Any question answered...

Nope. I wouldn't use front guard and probably wouldn't use 28mm front tyre. 25mm Durano is fat enough. I'd take whatever I get now from BB to front axle and try and get more than that by a few cm. The old 58cm Ribble would probably be good for this.

Saying that, I now realised that the Pearson Hanzo with it's slack 71.5 headtube could be idea to avoid toe overlap.