So at this very moment, I'm printing an array of three identical objects. The objects with corners on the outside of the HBP are curling slightly only on the outside corners. The object with all corners on the inside of the HBP is printing perfectly. I strongly suspect that is b/c the outsides lose heat much faster than the inside. Could you guys (private party or MakerBot Industries) design a HBP very similar to the v1.1, however, the traces on the outside of the board should be thinner and, as you move toward the inside of the board, the trace width should increase. This would allow for a more even temperature distribution. It wouldn't be perfect, but it would certainly help on larger parts.
I would do this myself, but the 'free' version of Eagle PCB only allows 3.4"x4.0" boards.
If this is the wrong place for suggestions such as this, someone let me know and I will correct it.
Thanks,
J
Edited to add: I have the aluminum plate on order, so this should help. Still, there are others out there who may not and I'm sure you could agree that this would be a good thing!