I have encountered an issue. The grill is held on with clamps which have a quite large offset, so the grill will only be held on by them if the speaker is on the front of the panel rather than the rear. I'm getting a bit of a buzzy noise which I suspect is air going through the speaker screw holes. So should I put the speaker in its proper place at the rear of the baffle, and find some way of shimming the clamps, or should I just fill the holes? I realise that having the speaker on the front of the baffle has changed the volume, but will this have had a significant effect on the cab? Other than the buzz, it's sounding fine, powered by a Tecamp Puma 900. I would have used a Hotone 5W amp but it's been so long since I used any amps that I've lost track of my jack-Speakon lead.