Has anyone tried a RediRad or a device like it on your Craig? The idea is that it plugs into your FM antenna input on the back of the radio, supposedly allowing clear audio. It is still an FM signal rather than true AUX input, but doesn't require modifications to the radio at all.

I'm (very) slowly upgrading my stereo system and this seems like it might be a good alternative to shipping my radio somewhere to have it modified. I'm sure it isn't as clear as a true AUX mod, but curious if this setup works as well as they claim.