Short slot combs
Hohner reed plates are "Long-slot" in keys up to and including C. Keys of Dd and higher are "Short-Slot" meaning the reeds are shorter.
Marine Band combs for these keys have shorted channels.
On the highest pitched harps, you may start to run into trouble getting the 10 blow half-step bend. It may sink into the full step bend offering you very little control. The trouble here is not only a matter of technique - although you do need to master fine motor control.
The trouble is mostly a matter of physics.
The acoustics of the reed chamber can interfere with the resonance of the 10-hole half step blow bend. Short-Slot Hohner Marine Band combs try to compensate for this. I've taken it a few steps further.
My solution has been to change the shape of the chamber so that the acoustics cooperate with the resonance you create as you play.
Until now, I have only offered this innovation in my custom harps.
Starting today, I will offer this design on all Short-Slot Hohner Marine Band and Golden Melody combs I make.
Here is a Factory Short-Slot Marine Band comb compared to my Short-Slot comb: