The larger Vice is printed at 150% on E3D's BigBox, the smaller Vice is 50% on a modified Trinus.
Both printed with SpoolWorks PLA | http://e3d-online.com/spoolworks-3d-filaments
How well do the threads of the 50% model work? When scaling it down also the clearances are scaled down. On the picture the print quality looks amazing - you printed a regular M6 screw. How did you modify the Trinus?
Modifications to the Trinus are here | https://www.thingiverse.com/thing:2179027
The threads are fine, maybe a little tight but after working the part up and down the thread a few times it worked perfectly.
It has a few as yet unavailable E3D components and a few printed parts of my own design. They will all be available in the coming weeks.....