Track geometry how can it be improved!?

i cant see your BB drop in the picture ....

.... From a picture it's very hard, because it's never exactly 1:1 scale..... you will end up with a very rough result. ...

Rough being the operative word I just tried to work it out from the pdf above (bored at work). BB drop should be about 64.7 mm. Using Dutch Cheese's suggestion of a wheel w tyre at 675 mm the BB height should be ca 610mm?

These calculations are obviously rubbish for planning your next custom made bike, but might be worth it for looking at frames (w/forks) at eBay.