Okay to install CWM Recovery on Galaxy Nexus 3 GT-i9250M? This article is very explicit that installing CWM recovery is only for the GT-i9250 and that the:


  process here is not for other variants of Samsung Galaxy Nexus, like: GT-i515, GT-i516, GT-L700, i9250T, etc.


However this post says:


  There are no hardware differences, just tweaked software (specifically Radios)


Is there any real risk to installing CWM Recovery on the GT-i9250M?
Is there any real risk to installing CWM Recovery on the GT-i9250M?


Short answer : No

More information :


  between Install Recovery, there is many reasons or problems or other Something you should attend ...


Do not Power off Device. Device maybe at Flashing or Install CWM
Proccess can Break or Turn Off Completly.

or other something ...

but there's not fear or escaped from this Proccess.

Most of the Time, you can Flash a Stock Rom With Odin then, your Device is availabe for use.
But : 

you need Special CWM for your Device, ( Special For GT-i9250M ).