MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
The bowden tube should not pass through the heatsink to the hot end. There will be an air gap of about 12mm until the filament enters the brass tip in the heater block. I have had to heat mine to about 230 , hold the filament release lever and push/pull the filament until it begins to ooze.