Originally Posted by
vantassell
The only thing that matters (in respect to fit at least) in a geometry is Top Tube length, everything else can be adjusted (unless the frame prevents you from setting the seat low enough or high enough than a minimum insertion line on the tallest seat post available)
I disagree. Unless you want to take a saw to the head tube, you may not be able to achieve the drop you want. TT and head tube have to be considered together. I agree with the rest of what you said though.