I don't have a problem (in the context of this thread where we are discussing the worst things YOU CAN DO to a double) with totally original single triggers.

I have never owned a Boss single trigger (though I do have AyA, Beretta and Merkel ones) but I have it on good authority that the Boss trigger is one of the very best WHEN CORRECTLY SET UP. Unfortunately, it is complex, some are over 100 years old and have very probably been 'got at' by 'the wrong hands'.

My preference is for a double trigger - and I would have any conversion to a single trigger right here on the 'worst things' list ...... but original triggers should stay how they are - original - and get fixed by the OEM, or suitable specialist if troublesome. The vast majority can be got very good, but I accept there are a few rogue designs, both English and Spanish.

Luckily my German, Italian and Spanish examples work just fine.