Pro Mini Flash Tool

If you don’t want to solder headers to the Pro Mini this is a simple clip that will do the job
to program the chip.

Printed at 50% except the Body 100% for extra strength.
Using Pogo Pins, They can be found on Ebay.

https://www.ebay.com/itm/50pcs-P75-LM2-Dia-1-02mm-100g-Spring-Test-Probe-Pogo-Pin-Receptacle-Tool-Set-/192682673511?_ul=NL

The Pogo Connector is made from a piece off Arduino header, drilled to size and the Pogo’s glued in place with some CA glue.
Connection whit the Arduino, FTDI 232 board
Case for the FTDI 232 can be found on
https://www.thingiverse.com/thing:3046535