A Q400 requires Cat 6 RFFS and DND only has this for a couple of hours per day (or by special arrangement). The rest of the time it is Cat 4 RFFS. The 328 is Cat 4. Cat 6 requires 2 appliances whereas Cat 4 only needs one (and a smaller one at that). I'm just speculating but could it be that DND has a short-term problem with staff, equipment or something else RFFS related?