I bought a couple of BW tabs awhile back and tried them out with so-so feelings toward them.
Here a couple of months ago I was given a BW tab that had been cut down short like the one in your picture.
I laughed at first thinking it was ruined by the previous owner. I was shooting in the house one day and grabbed this tab just because it was handy. WOW what a difference over the stock tab.
I couldn't stop using it over my old Calf Hair tab. Such a cleaner release and no slap of the layers hitting each other. < The main reason I couldn't stand using them.
I now have 4 BW tabs trimmed down and ready for service.
bretto