OnShape URL: https://cad.onshape.com/documents/7532f4bd1851a58a0b46e888/w/f207919a39b8bdad16042b5b/e/30e5bc26c2f24caae9a6dde3?renderMode=0&uiState=67896d316c0d287ce7e03517 

My Klipper config: https://github.com/spajo/n3p 

This mounts both Eddy and stock probes to the extruder if you need flexibility or are just experimenting.  I used threaded inserts to make the eddy a little more rigid. 

I will probably switch back to using this adapter as it also fits Neptune 3P-series after I finish experimenting with this setup.

Eddy Duo/USB has quite a bulky cable so to avoid dragging it on print surface I also designed a cable guide that replaces original X-axis limit switch cover.

18.01.2025: Added no-inserts version

I used BTT and Elegoo provided models of Neptune3Plus and Eddy to make measurements.
https://github.com/elegooofficial/neptune3plus 
https://github.com/bigtreetech/Eddy/tree/master 

Offsets for stock probe

x_offset: -28.75 # stock probe with eddy adapter y_offset: 25.15 # stock probe with eddy adapter

https://github.com/spajo/n3p/blob/main/printer_data/config/probes/stock.cfg 

Offsets for Eddy probe

x_offset: -44.29 y_offset: 29.76

https://github.com/spajo/n3p/blob/main/printer_data/config/probes/eddy.cfg 

 

Original Probe Offsets without the adapter

x_offset: -28.75 y_offset: 22

Extruder fan shroud visible in photos: https://www.printables.com/model/857706-ultra-efficient-dual-5015-fan-duct-for-elegoo-nept