I think that my problem is that I cannot see the waveforms of both the start and end points at the same time in high precision; zooming in to see the wave form leads to much scrolling forwards and backwards. And I find the scrolling a bit clunky, so I overshoot the desired destination.
It would help a lot to have two waveform views side by side, so that I could see both positions at once. Perhaps something like:
... Big pic: http://i.imgur.com/gDfzqB0.pngEven better would be overlaid images showing the waveforms. Such as done in ExSC:
... Big pic: http://i.imgur.com/0WJbaLq.pngIn the lower panels, the left-hand waveforms are those at the end of the loop with the waveforms at the start of the loop shown faintly. And the right-hand waveforms are those at the start of the loop with the waveforms at the end of the loop shown faintly. You can see that it not quite right yet.
I can drag either left or right side to line things up perfectly:
... Big pic: http://i.imgur.com/q5sR4sd.png
