When I used a clog buster pressure jet under the kitchen sink, a bunch of
black junk came up into the tub ~20' away. I remember a cleanout on the end
of the kitchen line and the bathroom line from the last time I was under the
house.

I'm going to find a plumber with a small drain rooter that can be taken down
into my crawlspace. And want to inquire about the best cutter head for
knocking rusty scale type material from the interior of the pipe.

Do any of these type heads look better than the others for that purpose?
http://www.plumbingsupply.com/genera...ter-heads.html