Progressive Special 20 setup

Is there any way to setup a Progressive Special 20 to play as tight as an original Special 20?

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The Progressive Special 20 is more or less identical to the earlier version except for the cover embossing. If you find that yours is more airy than you like, try lowering the reed offsets slightly. There is a detailed HOHNER Service Video on our Youtube channel which shows how to do this:

This shows the process on a chromatic harmonica, but the procedure is just the same on a diatonic and is actually much simpler, as there are no windsaver valves to get in the way. To change the offsets of the blow reeds it’s best to unscrew the reed plates so you can access the reeds more easily. Remember to put the reed plate screws back into the same holes afterwards.