Aluminum Build Plate for Makerbot Mini (Printed on Makerbot Mini)

My original Makerbot Mini's plastic build plate keeps forming cracks on its build surface (See photo). I always use blue tape but I'm on my 2nd build plate. Aluminum would be far more durable so I built a new custom build plate.
It's printed on the Makerbot Mini itself.
My example photos are made with white PLA, but I recommend black PLA.

You will need:
*JBWeld gray epoxy (Comes in two tubes you mix together). Don't get the 5 minute stuff. Get the longer curing kind.
*(2) Steel rods (Nails with