I received my Stolspeed VGs today. I've watched several YouTube videos on how to install them and where. I'm going to put them 35mm behind the leading edge and put two of them in alternate directions between the ribs using the template John sent in the kit. What I'm wondering about is how to make a line from the wing tip to the root. I have white PolyTone wings so I don't want to use a marker. I've thought of using a chalk like but that doesn't seem like it would be all that accurate due to the ribs and valleys between them. I thought about using the alignment template used to make sure the leading edge is in the correct location and making some kind of jig but I don't know just how I would make it work. Does anyone have a suggestion?
Thanks
Fred