Interesting lesson learned: I had written my own 3D engine for Hack24, however came across this book https://www.packtpub.com/game-development/building-3d-game-libgdx, the code was extremely well structured and I was about to bin my own framework and use this one as it was a bit further along.
I thought I would run a few performance tests, just to be on the safe side. Glad I did:
Theirs: 400 objects rendered: 22FPS
Mine: 4608 objects rendered: 15FPS