Close Wingtip Fit

The manual has you do a bunch of contortions with straps, tap, and other shenanigans to get the wingtip to fit properly. Sling does a great job getting parts manufactured to tight tolerances, but in my experience, fiberglass parts always have gaps that you can't work away by just fitting parts together. Here I'm masking off the aluminum and laying down a mixture of micro-balloons (composite guys are familiar with this stuff) and epoxy to a toothpaste-like consistency. I'll use a spreader to force the mixture into the gap and to fair the interface between the aluminum and the fiberglass. The result is an inability to see where the aluminum structure ends and the fiberglass wingtip starts. The stuff is easy to sand but strong. I'll start with 80 grit and work down to 320 for priming.