livo's post has perked me up a little. the rev 2 go was disappointing. in fact well bad.
the rev 1 version last week had so much promise and was a clear step forward.
the rev 2 was step back. the bbq without a cover is simply no good. the aesthetics were spot on. the meat had the better original "lamb" taste. the texture was tuff (a bit like normal roast lamb) - had to be cut with knife could not be forked.
the bag marinading worked a treat. the marjoram in place of rosemary was perfect. the onion bed on bbq worked spot on.
my current going forward thought is to use rev1 till either i can find/make a cover for the gas bbq or get approval to dig pit.
in short i cant see how the objective can be achieved with what i know or have so to speak (eqpt). adding water (cover) takes away from the taste - adding flame fails on the texture.
its a real bugger and rare that i cant see a way forward.

was cooked on lowest bbq flame for 7 hrs turning at half time. the instant read was 70 to 75C