Wow that looks messy, but fun
What speakers is it? The spacer bumper between the bottom 2 boxes looks like some thing from a manufacture, I have seen fare worse.
I have done the "same" a few times with opening the angles on the bottom box(s) more that the default max angle. And it can work really well if you don't have down fill boxes or if your very restricted in weight. However you all on your own as you can't predict the response and unless the manufacture makes a spacer bumper you can be in a world of shi... rigging wise, so don't!.
mvh.
RAsmus