The JWs often say that they can prove what they believe from any bible. Thing is, they can't and so won't use any other bible to prove their beliefs.
JWs used KJ translation to "prove" their beliefs for years and many still use it in service to persuade those who trust nothing else.
Also, I once again ask any who fault the NWT rendering of John 1:1 to explain to me why the Greek CAN'T be rendered "the word was a god." I'm here to tell you that is a perfectly legitimate translation, but I'll gladly listen to counter-arguments.
As someone pointed out, insertion of Jehovah in many passages of NT is probably the most blatant manipulation of JWs in NWT.