A remix of a remix. I widened the thing so the tail-fin does not snap off when printed smaller, & poked a hole so it can be put on a string or chain (~2mm) etc.
The problem with printing multiples of these at speed are the tail-fins end up connected by thin stringy PLA 'fluff'.
I had to space them wide enough to combat the stringy bits and allow just enough cooling time while still @ 200C (to not delaminate the thing by printing out too cool.)
The post print cleanup utilized my trusty brass brush to kill off the final fluffy bits of PLA.
Sliced 0.3mm @ 200C for PLA.