By the way guys...Issue Fixed!
I found when i am screwing on the
tank to the base section, it starts to get very tight closer to the bottom threads of the
tank section(this is also the same when screwing on the top section) i just lubed the crap out of it and got those threads nice and smooth by screwing and unscrewing a few times (lots of screwing going on here!). End result
tank screwed on completely at the top and a small gap at the bottom (did not want to force it) but now there is no more leaking and yes i definitely suggest to lube all the threads and the chimney o-ring, this makes life alot easier!