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.
Thank you for the suggestions, I found this remix and printed the example part for the idler that includes a lever. I tried it and it works great, I can now push the filament very easily even when the spring is very tight. So I guess problem solved.