Sticky Chicken Wings for a Crowd

This recipe has been adapted from one by Matt Sinclair.  I buy 2-1/2 Kilos of chicken wings, then take off the tips and chop it into 2 pieces.  That gives me about 2 kilos of actual wings to cook.  The first time you cook these, maybe back off the chili flakes to 1 tbsp. if you have some chili-phobes in the family!  These are also good served with lime wedges.