I built a Sundancer for a friend with a YS 63. The covering is terrible, but manageable. It was nice to have the instructions include a template for the cowl cut outs. All I had to do was trace them on the cowl and cut. Throw away the spinner that comes with the kit and buy a quality 3-D cut one. The last two Sig kits I put together had these spinners in them and have failed. The back plate on the Sundancer came apart and chewed up the fiber glass pretty bad. Dry weight on the plane was 5.875 lbs.
Adam