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.
Tech2c changed the mount a few months back. To change heads more easily he put the lock nuts to the front and puts the screws in from the back. This would be helpful for your system as well.
So you can remove the whole printhead if you want to change something on the carriage.
Please have a look how tech2c changed his. Thanks and Thanks for the great work. ;)