Dropping your jaw will solve the brightness (I had to deal with that issue last semester).
Now for CKB mouthpieces, they are made to project. I have 2 Acoustibalance 3C's from them and I can cut like no other trumpet in the region. I literally filled up the whole room more than the region band did; They played at like fff and I was around fffff and a real dark, definite clear tone that covered up the rest of the region band. I'm telling you this because you need to be aware of your power on the CKB mp's. If you took a Bach or Blessing MP and tried to play as loud as you can, the tone will split before you can even reach about 38-45% of the volume the CKB can give you (while still sounding full and rich). CKB mp's are awesome, but you need to be aware of your great tool.