Have a Chambers' Late Ketland on hand and need advice on whether this lock would be OK on a Bucks County LR? To support this idea there's Weiker's BC LR on p.260 of RCA, vol. 1 and the lock has a roller on the frizzen spring w/ a similar plate outline. Shuler's BC LR on p. 270 of RCA, vol. 1 has a similar plate outline but no roller on the frizzen spring. Have previously used Chambers' Golden Age and Deluxe Siler on my BC LRs and the plate outline of these 2 locks is possibly similar to only the Verner BC LR on p.264 of RCA, vol. 1. The Late Ketland sure would lend itself to a very slim BC LR but seeing my only reference is RCA, vol. 1, does anyone have addt'l BC references or opinions that could help me determine whether to use the Late Ketland? Any info would be highly appreciated...Fred