Polymax is my favorite material for parts requiring strength hands down.
It all ready printed fine through the standard Z hotend, but I'm seeing an even better, more precise print with the ZT-HE, and nicer surfaces.
Just a subtle 5-10% improvement, but it's definitely better.
Nice support removal too if you are careful what you print with it. Internal or hard to reach support should be avoided.
Z-Temp @ -70
ABS 0.19
60% fan
Bed heated then switched off before starting print
No shim