Thanks!!
Yes, PLA.
I will try build a little box around it.
I had this thought sometime last year but never got around to it, I have a large tub I could fit the printer inside of!

@Dave: This disk - How do you do this, is this a slic3r setting or modifying the 3D file? If this can be done in Slic3r - Can you make it more than one layer? Maybe 5 layers or something?