Just installed the TC peep on my Lyman LH Flintlock Deerstalker.

See pics below with a before of the tang screws, and another after installed.

Attached Images
Deerstalker Tang Screws - Before.jpg (51.05 KB, 2999 downloads)
TC Peep - Deerstalker Angle Pic.jpg (88.56 KB, 5809 downloads)