The five worst bolts I ever pulled and replaced at Pinns were on Beyer routes. Three on Tuff and two on Digger. One of the bolts I pulled on each route came out - with a large amount of cruddy rock attached in both cases - with one single hit on a crowbar placed under the hanger. All of these five were 1 1/2 inch long Star Dryvins. I was dismayed with some of these to see that very good rock was located nearby; on the second bolt of Digger his bolt was so bad I was (again) shocked. And yet I placed a superb, long, 3/8 inch stainless in fantastic rock about six or eight inches up and right from that placement.
The guy had balls, but I'm glad I've now led every route he established at Pinns (and thus I never have to go back on any of them!).