I absolutely suck at aquascaping

[cvrle1]

I kinda came up with one structure yesterday. It was complete fluke, but so far I like it (location and angle are not final). It did raise some questions thought that i wanted to inquire about




Few of the top pieces are barely touching one another, especially flat piece top right. How would you go about making this more secure? Even if I use glue and/or cement of some sort, there are very few points of contact between the 2 rocks. Should I try to build up shelf piece with smaller rocks using glue/cement and then connect to the bottom one, chisel away until it fits more securely, something else?

Since rock is heavy, and I have limited opening on the aquarium top due to acrylic brace, I will need to do this in 3 pieces. Once it is in the tank, should I connect all 3 pieces or leave them as separate? If I leave as separate, worried about one part falling over. If I connect, I wont be able to take out or remove if need be.

Thanks again for the help and tips so far.