Fill your smoker box/s with hickory woodchips and place them on the weber with a convection tray. Pre-heat your Weber Q on high until you begin to see smoke generating.
While you're waiting for the smoke to generate, remove the meatloaf from the freezer and tip the loaf tin upside down onto a wire rack/trivet. Optionally drizzle your favourite rub and carefully brush the glaze over the top and sides.
When you begin seeing smoke, place the meatloaf onto the centre of the convection tray, insert the meat probe into the middle of the meatloaf and close the lid. Turn the gas control knob down to the middle/medium setting.
Try to maintain a temperature between 170°C (340°F) and 180°C (355°F). Adjust the gas control position if required. Cook for approximately 1 ½ hour to 1 ¾ hour until the internal temperature of the meatloaf reaches 74°C (165°F).
Once the temperature reaches 35°C (95°F) internally or 45 minutes into the cook, brush the glaze onto the meatloaf for a second time.
When ready, set the meatloaf aside for 15 minutes to rest under aluminium foil, then slice and serve.