... easier heres the box file of just the single track heres a scruff video of me following the process( ignore the error near the end) Note that I cannot use the extend feature Attachment: attach_2590_3141_Daves_scruff.mp4 257 Last edited on posted: 29 Nov 2017 18:50 by madscientist 29 Nov 2017 18:50 from: madscientist single track box file Attachment: attach_2591_3141_singletesttrack.b ox 235 posted: 29 Nov 2017 18:56 from: madscientist if I reverse the final extend, making the S curve the control and try extend I get this 3004_291356_250000000.png posted: 29 Nov 2017 19:03 from: Martin Wynne Hi Dave, The reason for that is that the upper transition curve (from which you created the lower one) was misaligned with the straight. Consequently, so was the lower one. In order to make the video, I had first to correct it. Here's the video clip: http://flashbackconnect.com/Default.aspx?id=ueSTP8X4r6mKuQmxXcZanA2 .box file attached. regards, Martin. Attachment: attach_2592_3141_dave_shortened_tr ansition.box 237 posted: 29 Nov 2017 19:10 ...