Silverton why do you say there is a difference in a rcd and a finder holder?
This is just my take on the terms.
It seams that RCD's are most often run with a pack and the pack is finding and helping to catch, the RCD is the anchor. Not much selection for holding style. Rough curs and cur bully crosses and straight bull dogs.
Finder Holders are hunted 1 or two at a time and are finding stopping and holding on their own. Clean holding style is needed and these dogs seam to need some hairy dog, Dane, grey hound, ect... in them. The size is taller in most cases which allows for more efficient holding with little to no damage to the dog.