this actually the third arrangement,
the first was unstable and when i casualy bumped my hand into one of the rocks to see if it was sturdy, the whole thing collapsed.....
another 20lbs of live rock and arrangement two formed which was kinda a split, two clumps on either side, but i missed my arch...i chose the long piece specifically for it....
so then i decided to rearrange it again! and now i am happy with it. except i had a couple extra pieces so i put those in the back right corner...and there is one chunk up on the top left, right in the far left, top that i am not to fond of.
... aww man. this is why you really cycle your tank for 4-6 weeks, cause your trying ti find the right arrangement for your rocks!!