After a total of around 8 hours of printing with the Laywoo-D3 with no blockages I'm fairly confident that the .5mm nozzle has done the trick. Enlarging the UP nozzle also hasn't seemed to have had a detrimental effect on ABS or PLA printing either!
Something I have learned is this material really likes plenty of air. Very much like PLA in this regard. Otherwise it has a tendency to become quite stringy.
This is a tornado I printed at .15mm. Its a little furry.