There are dozens of Ray Charles Fly Patterns, representing Scuds...most using the hot spot
Hot Spots can be used for many nymph patterns and streamer patterns
I like the Royal Ray Charkes fly pattern, submitted by Satoshi Yamamoto
Al Campbell's Too Simple Ray Charles http://www.flyanglersonline.com/alcampbell/ac022304.php is also another verison of a hot spot Scud fly pattern.
For whatever reason, hot spots do cause fish striking the hook... ~Parnelli