slumping small 3 and 3/4 inch dish

To slump this tack fused piece I used the following schedule:

300dph.......................................................1215 degrees..........................hold 15 mins
Full.............................................................900 degrees............................hold 1 hour
100 dph......................................................700 degrees.............................hold 1 min
off

Notice slight pulling on the left side.  There is a little unevenness around the edges.  In the next slump I have decreased the processing temp to 1210 degrees and I will hold at the processing temp for 30 mins instead of 15mins.  Lets see how this effects things.  Well this one split in half, what happened here I do not know.  I am going to watch Bullseye video on slumping again.