Fried,
Yes albeit a good while ago. It is very nice. I got onto cooking the lamb in hoi sin (copy cat crispy duck) and got hooked on it. Recently started doing the lamb shoulder for roast (same method no hoi sin).
The blackened lamb seems a sort of best of both worlds - the taste of lamb in its own right but with a subtle flavouring around the edges. I'm thinking pit on the qt if the overnight marinade/gas BBQ is not a breakthrough.
Best wishes