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.
Air should be blown across the heat sync cooling fins. The stock fans are very cheap. Most people doing this type of upgrade replace the fans with sealed bearing versions (and often upgrade to 5015 radial fans). If your stock cooling was pulling air from the hot-end box. the fan was mounted wrong to start with. The sticker on the fan should face the hot-end with air being pushed across the fins.