If you can't get a new stand right now try and get a piece of 3/4 inch plywood cut to the correct size of the tank and set the tank on that so there won't be that overhang.. You're just asking for that thing to blow... IMO that's what i would do...
The plywood idea is a good one, you should really look into that.
I like the wood, but maybe you could take out all the other stuff and just use the wood, spread it out a bit more or something, it looks like it's taking up your whole tank, and that is a waste of swimming space for your big fishies
The moonlight gouramis are about 14cm each or 5.5 inch this was a rough quich mesure of them,
i think im going to take the slate + plants out and just have the wood in there and as someone mentioned spread it out more that way i will be able to put the larger pieces in to the tank that way.