I only had one PLA filament. And since I was getting really good results with ABS, I had not pursued this again. But I now have a few sample PLA filaments on hand and I will need to revisit this.
http://cdn.ipernity.com/200/01/16/37...a6777a.500.jpg
http://cdn.ipernity.com/200/01/18/37...1a67e0.500.jpg
This is in a PEI plate on the Taz5. I have had very little issue with warp with ABS. The only issue I have had to date was printing a 10" LED light strip that was not very tall (Z axis). It wanted to curl on the ends. I added extra pads on the corners and it printed just fine.
I am not saying I did things right. Just saying its been working.
I am willing to entertain suggestions as to what to change or improve. I would dearly love some constructive feedback as to procedures and settings.