Hi, Geoff,

I've spent a little time thinking about this. I think that with a heated bed an arm that is only 15mm tall might end up being straight to much larger size than what you currently do. I've already printed an object to 13" just on the 12" prototype that we have (it was printed diagonally) - see the snakes: http://www.flickr.com/photos/3dmonst...n/photostream/ the larger snake is 13", the smaller (printed earlier) is 5"-ish and is there for comparison.

Would you like to send me a test design that I can try on my prototype machine in PLA (even w/o a heated bed)? I'm curious to see what will happen.