A simple way to stop scarf creep is to drill a couple of shallow 1/16" holes in the neck piece then insert a couple of cut-off brads. Leave them sticking up about 1/16". When you clamp your headstock on, it won't move. I also use this method for glueing fretboards to the neck.
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The pointed end is a result of cutting a pair of necks out of one piece of stock.