I wanted a Heatset Insert Press and I realized that I have a Dremel Drill Press that I haven't been using - Thought I'd be able to make a little adapter for a soldering iron.  Just about any of the inexpensive Amazon soldering irons will work, but I did link the one I used.  I find these parts together to be less expensive and more functional than other options - plus you can still use the press for your Dremel!

Supports needed only for the larger hole.

Directions:
Remove the two bolts on the underside of the black piece that would hold the dremel and use those bolts to attach this piece. 
Insert the soldering iron (depending on what soldering iron you have, you may wish to insert this before attaching it to the press itself)
Insert two M3 bolts with nuts and washers to lock in the soldering iron - easy as that!

Let me know if you have any questions or requests!

PRODUCTS USED:
Dremel 220-01 Drill Press ($45): https://amzn.to/4aZmo4S (aff.)
Inexpensive Soldering Iron ($16): https://amzn.to/4bHSlyP (aff.)
Inexpensive Heat Set Insert Tips($9): https://amzn.to/4b26FCg (aff.)
Assorted M3 Hardware: https://amzn.to/3QBLj6n (aff.)