Variation: To keep them sweet, substitute cacao chips for the currants. Try golden raisins or cranberry chips. To go savory, remove the sugar and use grated cheddar, or fresh herbs like rosemary, basil or oregano - maybe dust with Parmesan. Experiment.
If you find that your scones cook unevenly and you have to rotate them after 10 minutes, contact your appliance repair person and schedule an appointment. Might be time to recalibrate your oven.