Gronitz PCM, what mouthpiece do you use?

[mdc2d]

Wondering what you PCM owners use on your horn. After getting mine in November I'm still messing around a lot with MP's. Also have noticed some mouthpieces aren't fitting right in the receiver and causing some pitch issues (my helleberg wobbles in the receiver). I used a PT-50 for band/orchestra on a Kalison DS, but still not sure what I think about it on the Gronitz. Any suggestions would be great!! MC