I'm going to go against the grain of this thread....

I didn't like my 511's. I feel the Scrapper 5 is a better design, and the execution was higher on it. (All of my 511's had noticeable gaps between the Res-C and blade where it met the tang).

The mudders on the S5 feel great, and the blade profile is better (IMHO). The mudders are why I like the 411 (kept the 411's and sold the 511's). In fact, I'm giving away four 411's this Christmas because for "sheeple" its a perfect sized knife.

I think the Scrapper 5 was one of Dan's best designs (if not the best overall knife).

ETA: My wife prefers mudders to any other handle design she's used.