Non-Responsive Suggestion: Use easements in your curves; e.g. start at 096, then 080, then 072 at the apex then reverse the radii exiting the curve.
I've recently spent a lot of time running or observing our club's 46' x 20' travelling layout's 3 main lines with constant radius curves of 072, 080, and 096 at the four corners, and I can say the uniformity and symmetry of constant radius curves is BORING.
If your are going to use GG flex track, buy some used curves in the desired radius/diameter to use as guides when you bend the track; or, better, cut templates with the desired easements.
Just my two cents. It's your railroad; build what you like.
