This is my 1st concept to print project. I've printed lots of stuff from thingiverse so I figured I should give back a little.This adapter fits the older Etrex (yellow, 12 channel) GPS. I needed this so I could connect the GPS to my kenwood D710 for use with APRS. I like this GPS cause they are inexpensive and I don't mind having it dedicated to APRS.get 4 jewelers screws with flat heads. (mind you, anything less than an M4 is a jewelers screw to me).Solder a lead to the screw, thread it back thru the adapter.Because the print is so small, the 3rd and 4th hole are left open with the key-notch. But once inserted into the adapter, it all holds pretty tight. I did increase the size of the left and right tab in order to help it fit more snug.If you can improve the design, please do ... and let me know cause I wouldn't mind having a better one