Properly Anneal High Temp PLA Protoplasta

All,

I have printed some parts and attempted to heat treat them at 60C in a lab oven in a attempt to minimize warping. From the results shown I was not successful. I used 60C for a longer period in order to minimize warping. Items were placed on a wood block during the heating process. Anyone have any heat treating suggestions to minimize warping? Thanks in advance.

Brian