I'm sure you were still fine ... decibel killers aren't that good and you were only a third of the way to the noise limit 🙂
K
We recorded 104 db withoout a DB killer last year, so the Castle Combe officials would'nt let us on the track . This year with the DB killer fitted we recorded 94 db, so they do work!
If you ask me, for just £8.00 delivered they're a bit of a no brainer, I've just ordered the following replacenent that should arrive this Friday, I'll be making 100% sure it definitely can't escape during our next track day.