Yet another dual extrusion test piece - ideas welcome

[foehnsturm 970]

There are already quite a few test pieces available. But I'd like to have something challenging which doesn't take ages to print. So I started this one. It's printing right now and "unfortunately" works too well. Any ideas to make it more demanding? There is still some room on the upper part.  

Feature size is already down to 0.8 x 0.8 mm.

The only requirement is it has to work with new Cura and 0.4 nozzles.

Edited May 10, 2016 by Guest

[SandervG 1,521]

You may want to have different test pieces for different materials?

This may be a good entry point for two colors, but you would want something completely different for PVA.

And again something different for a combination with flexible materials.

[foehnsturm 970]

You may want to have different test pieces for different materials?

This may be a good entry point for two colors, but you would want something completely different for PVA.

And again something different for a combination with flexible materials.

Yes and no. Of course you want to have test pieces for special application areas. These will bring up a lot of additional issues caused by the varying filament properties.

This piece is intended as kind of an entry test which mostly focuses on the dual extrusion hardware. In other words, how clean (the result) and smooth (user friendliness) can a dual extrusion setup perform if part geometry is the only challenge.