I have followed the offline manual starting on page 61. I have tracked all the limbs of a skier in a Giant Slalom race (including movements of the ski sticks), over a small part of the course. I then created a new spline tight around the RH ski stick and linked it to the tracking data of the looser ski stick spline tracked previously. I followed the instructions to switch off tracking for the loose spline and played back the result, but the tight spline doesn’t follow anywhere near the track of the loosely tracked spline. What can I be doing wrong? All the parts of the skier were very hard to track and I had to use a great deal of keyframes to correct drift. The idea is to eventually cut the skier from the background by the use of an exported matte for use behind the titles for my video. To this end I first created a line drawing of the skier using Boris Effects before importing into Mocha and tracking. Would it have been more accurate to produce the tracking data from the original video?