I have boom end sheeting w/ the traveler in the middle of the cockpit. An accidental jib is unacceptable.
I installed a dutchman boom brake on the current boat and the previous one. Love it! Always there. It's run to a secondary winch. Want to lock the boom. wrap the winch and lock it down. Want to jibe. Release the winch, jibe and lock it down again. No worries. Never have an accidental jibe again.
I have exactly the same setup and I love it! Although I don't have it always
on, only beyond a broad reach. But the lines are always led through it so it takes me less than 5 minutes to 'activate' it. Wouldn't want to do without it.