Harmonica Tongue Block Trainer

Began to learn harmonica.
Started with Puckering. But now i want to learn tongue blocking techniques.
The original Tongue Block Trainers are make from a thin piece auf plastic (1 gallon container ?).
Gallons are not very common in Germany. And even ebay or amazon didn't provide a original trainer.
Of course I could make my self a clone some how, but thinking about it, I decided that I want trainer that is quite realistic.

So I scaled my real harp and made a 3D-Design.
Here it is: A trainer that feels a little bit like a harp.