I make fabric patterns and could really use a tool that does not exist (as far as I know). When we make parts that need to go together they are often complex curves, and though they are mostly different shapes their lengths have to be the same. Fabric tends to stretch depending on the direction the grain goes and it is often helpful to make corresponding “notch” or “cheat” marks to help match up the parts during assembly. I did find a Rhino Script that gets me half of the way there. MovePtOnCrv.rvb by Chris Tietjen found on another thread makes a point along a complex curve at a defined length. I would like some help making a short perpendicular line at that point then continuing the loop down the curve and stops when the length value is longer than the remainder of the curve. The length of the notch line could be defined in the script and manually changed when needed. It would be helpful to be able to select the inside or outside of the line but could easily worked around by offsetting the curve. I think this tool would make a fantastic button for anyone who makes things out of fabric or other pliable materials. It would also be helpful for someone making curved railings.