To get this right. I have not mentioned another investment property which i have had for 7 years and has equity and is stand alone (all 3 properties with CBA). If i draw equity from that property(with a different bank) to fund my 1 year investment to 80% LVR. Would that get rid of security?.. If so, when i sell my 7 year old property (possibly this year). Would the cash gained from the sale have to pay the equity i have released from it or does that loan stay with my 1 year old investment property?
I hope this makes sense.

Thanks for the answers guys. Much appreciated!