... do therefore is to put the peg at the near end of the template on the left. Click on it, and then peg/align tools> move peg on background template, and notch under> to CTRL-1. You don't need the notch for this, but it will make no difference. There is no need for the template on the right to be a transition curve, change it to a constant radius. The make transition function should then create the required S-curve transition between them, see: 2_021859_250000000.png Finally you need to adjust the template boundaries so that they are not within the transition zones. That will probably mean moving the fixing peg back to the other end and then shortening the template on the left. If the new transition zone is too long to do that, cancel the transition, increase the radius of the template on the right a little, and then try again. (You can quickly swap the fixing peg to the opposite end of the control template by clicking the red peg indicator box at the top ...