I do not intend to work in PLA at all unless necessary. My first goals are ABS and nylon.

i already have another machine on order that is much smaller, but has a heated bed and has been tested with PLA and I believe nylon. Though of course they are trying to push their own filament.

However, I do like the larger size of your -24 for some of the projects I want to try. I am still worried that it hasn't been tested with anything that would prove that it would work at near the full envelope size. I would love to see a 23" open cube displayed to show no warpage. Once you have the machine, of course.

One thing I'm worrying about is that at such a large perimeter there would be too much time for the previous layer to cool before the next layer gets laid down, and I don't know how this will effect things. And yes, I'm worrying about SSYS being lawsuit happy right now. But I suppose I can make my own enclosure...