That's interesting, Shed tuner.

I have to do some research on SSG. Spring Stop Guide / Stopping Spring Guide.

Then there is HDD. (Hammer Debounce Device)
Stephen Archer (Archer Airguns, an Englishman who has a shop in the USA, if I am not mistaken) found that the HDD for QB78 does not improve shot count in his 160.

Then there is FFH. Free flight hammer.

I think I will leave my 160 for the moment. But I will think about doing something like this for my QB78.