Construction Manual
With Dremel tool or by hand remove about 1/4″ of foam between the hard point marks on both cores. This gets filled with a mixture of 5 minute epoxy and microballoons to create the hard points. Try to keep this mixture as level as possible with the end of the cores as it is a bugger to sand very much. Also mark the location of the wire channell on the bottom of the wing so that it can be easily located after the cores are joined.