Currently testing design iteration MK3 of my ABP replacement for the ToM.
Have to find a way to print front and back parts without breaking them up into multiple pieces.
With a working ABP this is possible but I can’t use the right-back corner at all. 
Running a custom heat-up sequence of getting the bed to 120°C, waiting for it to reach that temperature, then 100°C because the broken acrylic introduces insulating air between HBP and belt.
http://marcuswolschon.blogspot.de/2013/01/thingomatic-broken-making-better-one.html