hmmm, yes stainless definitely has connotations of food preparation for me too

However it's a case for a GK-1 tube pre-amp. The two large holes in the side furthest away are windows for the tubes. The wavy curved thing is a support bracket for a couple of rotary switches. The channel section at the back is for a couple of transformers [angle mounted where the vents are]. The other bits littered around the place include covers, a couple of pointers for the knobs, some vent covers, a couple of brackets to mount small pcbs on. The black bits are rubber grommets carefully placed for the wiring.
The laser cutting was done by Hunterlasertech in NSW and they are great to deal with particularly if, like me, you aren't experienced in CAD design. It's amazing what can be done in the comfort of your own home though.
Looking forward to seeing your Pi 2's freo ... and other Aus. DIY efforts too!
Obvious isn't it

jules