that's a pretty big lobster tail!!
for the ten ouncer's that we did last week
i split the belly side of the shell with kitchen shears,
pulled most of the meat out of the shell and coated with olive oil and minced garlic
then re-inserted back into the shell.
we then inserted a metal skewer starting at the telson through the meat to keep it from curling up.
set the pg500 to 450F (HHT 130).
brushed the belly side with melted butter/herb de provence/lemon juice/garlic
and grilled ~ 5 minutes.
don't place directly over the fire pot! the butter baste will cause large flames there!!
flipped over, brushed more butter/herb/garlic/lemon juice on belly side.
cooked about another 5 minutes.
moved to zone 3 while cooking the asparagus spears in zone 2.
note: the doors on the direct flame side were open during the whole cooking process.
since your tails are nearly double the weight of the 10 oz'ers, you might
need a longer period with some time in zone 2 to cook through.
the slightly charred bits were yummy! the interiors were perfectly cooked