It took me 6 months to get my Guardala MB II under control. At first I could barely get air through it muchless blow it. I mean, I changed reeds, ligatures, and experimented with various distances of reeds and cork. A very experienced player who plays a metal Sugal told me to try a HR Otto link 8. About two years ago I progressed from a HR Otto link 6 to a metal Otto link 5. The link 5 worked really good except in the high register it tend to choke up sometimes. Not so with the Guardala MB. As far as I was concerned I like the sound of the metal over the HR. I can barely get a sound out of the HR link 8 with much huffing and puffing. The link 8 is about a 110 while the Guardala is 115. I'm just wondering why such difficulty in blowing the HR link 8? The experienced player also told me to stay away from metal mpc's. Why? I have a metal Dukoff D5 that I outgrew and wished to progress to maybe a D7 or 8. He claimed that metal Dukoffs are very shrill and that I play bright to start with. Can anyone address this please?