Hi Hamid,
Yesterday I compared all my mouth pieces for squeaks. I noticed that I got squeaks with my Theo Wanne durga tip opening 8, (110). No squeaks with my Durga 7*, (105). In the past I had squeaks with my java T95, (116). I have no squeaks with my Theo Wanne Ambika 7*,(105), or my Theo Wanne Gaia 7*, (105). For me the tip opening 105 blows well with no squeaks. At first I thought the high baffle was the cause of the squeaks but it was the larger tip opening.