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.
I have looked at the central pin cutoff and I agree with you but I don't know what line of the script in OpenSCAD represents the pin feature, as I am not familiar with this software. The only problem which worries me the most is a trapped powder between all inaccessible gaps which probably won't be properly blown away and this may cause jamming between mating faces. I am considering to model some holes underneath the heart to allow printer operator remove excess of trapped powder.