Thanks, for the input guys. When I first started printing, I struggled with adhesion to the bed issues. After checking in several forums, I tried the blue tape. Honestly, I have had great results printing on the tape and with a raft in regards to adhering issues. I guess in a way, those may be a crutch that is hindering me now from getting great results. I probably need to break down, buy some glass and give the 3Dlac a try. I've never been happy with the surface on the bottom of my prints.
I understand what you mean by z-offset now. The air raft gap would be comparable to the z-offset but instead of measuring between build plate and nozzle for first layer, it is between the raft and the first layer. If the air raft gap is too large, the first layer won't adhere to the raft and if its too small, the raft won't separate nicely. It essentially becomes part of the model.
I kept I higher bed temp in hopes of preventing the model from cooling too fast and therefore shrinking.
I did make some changes and had better results with the warping. I blocked some of the airflow and also added some right angles that were about 10mm tall around the corners but separate from the corners that were warping. I also lowered the temp a few degrees. I had much better results from that. I also lowered the raft air gap back to 0.2 and luckily I did not have any problems removing the raft. Maybe I could go lower.
The first layer was still not great. I think I need to find a way to ditch the raft and get some good plate adhesion from the start. Maybe I can fine tune it while it's getting started. Does that 3Dlac seem to about $40? The only place I can find it is Ebay.