So, aside from really bad data for DRK on Monday (which I went in and just edited) which looks like things were being double calculated... here's how the estimates look:
Coin - Estimated/Actual/Difference
LTC 0.01936/0.01924/~ +.0.6218%
FTC 2.74512/2.75732/~ -.0.4434%
VTC 4.67789/4.63828/~ +.0.8503%
DRK 0.11028/0.11149/~ -1.09120%
For me, this is close enough for government work and a crypto-estimate... aside from some very minor tweaks that I made that i'll probably revert back to on LTC... I think i'm calling the estimate portion of things done for now, unless there's some real big calculation error that pops up.
So, I think i'll move onto the ROI tracker-thingy now.