Summary

print 20% infill
1.5mm hole seems to give enough clamping
print x2 on end so u dont need support

ribbed for anti slip

v1 of clamping to push cold filament into hot end to clear clogs

using white filament seems to clog after print cools down

i seem to need to run pre heat settings
then manual push more filament in to ooz out clog

v2 magnets to stop it falling down behind printer or holes for rubber band loop ?

ask if u like some cad work
English or dutch