[codefox1]

Agree, use a nylon diddle stick, and if you don't have one, beg a dry chopsick from your kitchen and file it to fit slot. If you are using an ancient signal generator like most of us, a really cheap modern frequency counter should join you bench. Check without modulation, and not hhooked up to set, rehook it or use 20 turns of anything on a TP roll near the set, you probably know the drill. Turn on modulation and let us know whaty happens. Yes, hypercritical adjustments need to be very slightly be detuned, espedially with over performing tubes, which are becoming somewhare rare nowadays as are we.