Sal,
I had several of them. I think one of the problems was the interlocking fingers simply took up a lot of space. While it was surely strong enough, the shelf just ended up pretty far above your grip. And, if you shot off an elevated rest, it was even higher. Also, since mine were all obtained as a collector at a later date, I found that the "ears" on the screwdriver(coin?) slot in the pin were often deformed. I don't know for sure, but it seemed that pin was aluminum and bent easily. Maybe neither of these had any effect on the market accepting these Pearson T/Ds, they sure seemed very evident to me when I found one.
As with the Mercury Hunter and Maurader, and the fibreglass t/d bows wound around a wood core, Pearson found some interesting ways to differentiate from the others. They surely weren't bad bows, by any means! And old Ben was a character and maybe the best wing-shot ever. However, I feel in the area of styling, his bows were always just a step off the mark that was being set by Bear-and Black Widow-and Wing. At risk of setting off a bunch of criticism here, I see Pearson as a bit like Chrysler. I was one who liked many of Chrysler's designs. But, they were always a weak third in sales, even going back to the 60s. GM and Ford designs won their markets, and Bear styling certainly dominated theirs.
For my money, Pearson bows from the 40s were a lot more elegant than those from the 60s. And a pristine Pearson Bushmaster T/D is an especially nice find for the collector.
Pearsons are a great area for a collector to concentrate, if he sticks with the higher end of the line. Some of the Pearson Golden Sovereigns are nice bows too.