That's all good advice.

I've done the roof and left it all colourbond, no lazerlite. It's a bit dark inside, but I just bought a bunch of lights so it will be cool.
All my roller doors have padlocks on the inside to stop (slow down?) anyone that breaks in. I also have a bloody loud alarm with a screamer inside.
Where I live it's a bit of an overkill, but if you get slack with security you often have regrets. I hate regrets!!!