Did you mark or like did a FFT of some sort?

I imported the .wav track from the CD, manually put the BPM on 123.45, cut the first 21 seconds intro out (easier to sync on the main beat), and from there started dragging the track and adjusting the BPM, so that the first bar of the song and the last bar of the song were still on beat. My findings is that it's somewhere between .47 and .48