Did the OB Kossel Pros begin shipping on 30 November from MatterHackers?
Simplify3D -- commercial product costing around $140 US -- does support MakerBot's 5th Gen printers. To the best of my knowledge, they are the only alternative slicer & external control software for MBI's 5th gen printers. Of course, for $140 US, you could gut the electronics and put in a RAMPS or similar board. You'll also need one of the ass't thermocouple amps that are compatible with boards only supporting thermistors.
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