Next level BBQ chicken

Name: Next level BBQ chicken
Ingredients: 2 red chillies tops removed and reserved for the smoke mix (see below); 8 spring onions roughly chopped; thumb-sized piece of ginger peeled and roughly chopped; 8 garlic cloves roughly chopped; 2 tbsp chopped thyme; 1 bay leaf; 1 tsp ground cumin; ½ tsp paprika; 3 tbsp dark brown soft sugar; 4 tbsp soy sauce; 4 limes 2 juiced, plus 2 halved to serve; 1.5kg mix of chicken drumsticks and wings, lightly scored; 200ml ketchup; handful of thyme sprigs; handful of bay leaves; 1 tsp ground allspice; reserved chilli tops (see above)