@User: Well, I wrote Vesta because I didn't have an open source STA tool at the time, so it served its purpose as a way to get timing analysis in qflow until better things like OpenTimer and OpenSTA came along. Now, I don't have much incentive to develop it further. For most straightforward netlists, it produces an answer that is pretty well in line with what OpenTimer and OpenSTA say, so that's good enough for me.