We've wandered from Boss single triggers, but for those interested, Vic Venters' "Shooting Sportsman" articles were Hunter One Trigger in March/April 2010 and Miller Single Trigger in Sept./Oct. 1999.
Venters' HOT article was reproduced in the Fall, 2011 "Journal of the LCSCA". The Summer 2020 "Journal" featured the HOT.
Leslie Brown Taylor held the 1901 British patent #11,062 for Lard's single trigger used by Westley Richards
The non-selective Hunter One-Trigger was introduced in 1934
They work fine until they don't, occasionally simply from over-tightening lockplate screw. As said, Phillip and Jerry Andrews can get them right. I don't know if Abe Chaber is still at it.
