Can someone please show me how to chose a rectifier that will work on a Rockville DB15?

Not yet, I still need to install switches and do some clean up. First thing is wait for the MUR to come in.

Thanks alot I learn from you every time I come across a problem.

Oh I heard you did a little update/add to your tutorial? If so I would like to download it. If it cost extra i have no problem with that.