I buy whole chicken legs, they usually come 3 in each package. Buy the natural ones, they should not be marinated or have a rub pre-applied.
Apply the rub on all sides, make sure you cover it evenly. Put the chicken legs on a tray in the fridge for a few hours before the cook.
Fire up the grill, prepare it for direct heat. I use two full chimneys of charcoal here. Try to keep it at 140-160° C / 280-310° F. Place the chicken legs skin side up on the grates and close the lid. Smoke it for approximately 20 minutes, then flip the meat and grill for another 20 minutes.
Flip the chicken legs again so the skin side is up. Brush the chicken legs with the lemon curd. I usually heat up the curd in the microwave for 30 seconds to make it easier to brush on.
Keep grilling until the chicken is done. It usually only takes another 5-10 minutes. Use a thermometer, you want the meat to reach 70-75° C / 158-167° F.