Engraver/Router Retrofit

Interesting idea, but the slide / clamp control on the purpose-made items is a pretty important feature.

I agree. And I haven’t even used one.

I’d like one that has tweezers, side cutters, paste solder, and wire pen all in one tool.

Fast and easy
And if you be careful it keeps the rounded "ball-hole" and does not harm the laker.

This is getting increasingly off-topic, but I did hear a suggestion of using a hypodermic needle as the nozzle, specifically so that the tip can also be used to cut the wire by pushing against the board.