Hello!
I bought the SparkFun JST Battery Removal Tool SKU: TOL-27923. And along with a few miscellaneous items. What they were is not important. But for the tool, I did use it to remove the battery pack from a Micro Bit V1 device and it works exactly as the page describes, so I am convinced it is a good investment in 3d Printing.
However I can’t provide any of that as a review.
Gregg