Yeh I think ill just stay away from alu bibs and stay with lexan.
I figured i would need to use a diffrent blade for metal but now thinking about it more it seems like alot more of a hassle having to switch blades then get it to track straight again.
The disk sander attachment is pretty basic, all i did was Cut the bottom off a bucket and drill a hole through the center and attach it with the wheels center screw on the front of the bottom wheel so the spokes didnt rip out my fingers, and i just put a sanding disk on the front of that. and voila.
Also really considering purchasing this mini lathe aswell.
http://www.carbatec.com.au/woodfast-mini-lathe_c20064