Pictures?

They're not pretty.

Nah it's not melted, but more like it's been shaken apart, much like bending a wire back and forth until it brakes, but in many places. It's not downward force, more like the far end of the X axis arm has been pulled back and forward but not enough to break or bend anything.

I did have clear plastic sides loosely on to stop incoming cold air flow, but nothing on the top to lock in the heat. The extruder appears fine, although I haven't used it since the X-motor carriage crumbled. The belts were firm but with a bit of give, same as instructional video on tenstioning them. While trying to work out why the prints kept randomly skipping forward or backward on the Y axis I tried both tightening and loosening them, but by then, it was too late, the solidoodle parts had already failed.

Looking at the failed X-motor carriage parts now, I can easily crush them and they are seperating back into individual strands of ABS/PLA. Similar to when you print a part and the extruder is too high so the layers don't stick together properly.

Pictures?

I did have clear plastic sides loosely on to stop incoming cold air flow, but nothing on the top to lock in the heat. The extruder appears fine, although I haven't used it since the X-motor carriage crumbled. The belts were firm but with a bit of give, same as instructional video on tenstioning them. While trying to work out why the prints kept randomly skipping forward or backward on the Y axis I tried both tightening and loosening them, but by then, it was too late, the solidoodle parts had already failed.

Looking at the failed X-motor carriage parts now, I can easily crush them and they are seperating back into individual strands of ABS/PLA. Similar to when you print a part and the extruder is too high so the layers don't stick together properly.

Have you been heating up the interior?  How does the acrylic in the extruder look?  Are the belts drum tight or just moderately firm?

Cheers