Bộ phân phối chất hàn với đầu nối Luer lock

I was looking for a way to dispense small amounts of solder flux, since the smallest syringe being sold is 10mL, and even a gentle press of the plunger releases huge amounts. I did manage to transfer flux from 10mL to a 3mL syringe using this adapter but found the plunger to be still way too sensitive:

https://www.printables.com/model/599583-luer-adapter

My wife had purchased this five-pen set on Amazon:

https://www.amazon.ca/dp/B075R28129

She only needed a couple and was willing to share. It's a twist pen for dispensing lip gloss and such. The twist mechanism is capable of dispensing tiny amounts.

The adapter has a very snug fit over the pen, and accepts Luer lock needles and tips.

Printed in PLA+ with 100% infill. I ended up using Cura since Orcaslicer was giving me grief over non-manifold (not watertight) bodies on the Luer lock section. I tried using both STL and STEP files provided by wavexx but had no luck with either. Somehow Cura is more forgiving.