Left: The most accurately I could install threaded heat-set inserts freehand a couple of weeks ago. Right: What they look like when pressed into place using my parallelogram jig. I think the results speak for themselves.
You don't need to buy an expensive kit with heavy metal parts to accurately use heat-set inserts. Just some 3D printed bits and bobs that don't even need inserts to assemble - just screws.
If anyone in Australia thinks they'd like a kit of this thing, let me know.
A photo of four silver bolts screwed into a similar 3D printed part. This time, the screws are basically perfectly in a line with no visible wobble.
A photo of four silver bolts screwed into a narrow rectangular 3D printed part. The screws are subtly out of alignment, suggesting the parts they are screwed into are not accurately lined up.