Unterhausen, I haven't looked into wheel flop at all as a consideration. I better do a bit of research on what it all means.
Andy, what tube thicknesses would you suggest? Yes the seat post has I think a 20-25mm set back on the bike I am trialing the fit on. I know I could use a 0 setback post instead of a 74° ST angle, but visually I like the ST to bisect the centre of the saddle (if it continued).
HTupolev, I figured since I'm using an 80mm stem and short reach handle bars, which is essentially moving my centre of mass back, that by bringing the seat forward somewhat I can keep my body mass more central. This is all just my best guess.
Dsaul, that's good to hear that you've had positive experience with a somewhat similar steering geometry.
Really appreciate all the input!