Actually, I load the bullet first and leave the gun uncocked until ready to fire, so I'm cocking it with the bolt closed.... I think I have enough depth in the breech under the bolt to hide the toggle, and I can always use a hairpin spring.... On the .22/.25 cal breech I could close the bolt with the hammer cocked, on the .30/.35 cal breech, which has 1.5" hammer travel, you can't rotate the bolt down to the locked position with it cocked.... At this point it's just a thought, anyway....
If the hammer toggle/bounce preventer in the Hatsan was really improving the efficiency compared too, say, a modded Disco at the same power level and pressures.... you would expect that the Hatsan would have much greater efficiency numbers.... It doesn't.... I am still of the opinion that a properly tuned PCP shouldn't need a hammer debouncer.... They seem to be useful if you are running too much hammer strike for the pressure.... eg. on the latter part of an unregulated shot string, or in a regulated gun running at maximum velocity for the pressure....
Bob