Staggered ferrocene model

My first attempt at creating a 3d model of a molecule. I'd welcome some assistance in improving the build.

My build scenario

• Makerfarm i3v 8" prussa
• PLA (Gizmodorks)
• Slic3r v1.29
• Rectilinear detachable support, 3 interface layers with 2.5 mm spacing

Some history

Originally printed the model with support enabled which consistently resulted in failure. Then tried to add my own support similar to this thing which also resulted in failure. Diagnosed the problem to be supports not attaching to the bed well, hence the manual raft in the STL file. This addition, with support parameters mentioned above, resulted in the prints I have imaged. One of the hydrogen atoms detached from the support during print but the build was able to complete.

What I like

• The build completed without a significant disaster
• Supports came off with ease

What I don't like

• I was lucky that only one part of the model fell off yet the build was able to complete.
• A lot of support material is needed
• too many aesthetic defects

I'm posting this in the hopes to get some suggestions from master builders. Please let me know if you have any ideas.