Here's the dimensions I'm using:

Seat Tube Length: 500
Top Tube Length: 510 (horizontal, no slope)
BB Drop: 68

Seat Tube Angle: 74
Head Tube Angle: 73


I guess if I use a 72 degree seat tube angle, I'd get halfway there! Perhaps if I stretched out the TT a little, it would open it up too? Unfortunately, I don't have bikeCAD, I'm doing this all by hand, so there's not much to see.