So I’m going to make the attempt to use AgOpenGPS on our combine (Case IH 8120) for auto-steer in beans this fall. If it works out well, I’ll move on to planting and spraying next year. However, I seem to be stuck here. I accepted all the auto-matched parts. (I hope that was right) Then on the shortfall/missing parts, I’m not sure what to search for for alternatives? I’ve looked at the Alternate Parts spreadsheet, but I’m not sure what matches to what. Any help is much appreciated!
Take this with a grain of salt, everything I could find says the subs should work fine but you should definitely do your due diligence.
I just ordered one actually with the same trouble I used these subs
LED 9 -12 C2986025
REMOTEOPTO,STEEROPTO,WORKOPTO,SPEEDPULSEOPTO C58160
U3 C22466929
U5 C5369649
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Thank-you so much for the help! I confirmed best I could as well, but I’d take my confirmation with the same grain of salt. 
Boards are ordered and now on to the next step!