Print all parts, together or separately if you like cleaner prints, retraction make a big difference on the main body. 30-40% infill at 0.2mm layer height works fine for all. First, fix the charging plug in place and run the cable through the channel. Slide in the lifting piece with the clearance crescent facing the cable. Use 2xM3 16mm bolts and nylocks to attach the lever piece in place. The ejector paddle works with very little downward force amplified by the >2x lever action. Enjoy! If you like this design, feel free to donate and ask for improvements:   https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=AW57FTXN35YZE