beards-n-bone, have you ever tried an average sized mouth call and just trimmed the tape to fit your mouth? When you tilt the mouth call forward you are only acessing the top reed. The call has to be level to acess the other set back reeds. Also, the call should be place far enough back that it sits on the middle put of your tongue. The tip of your tongue should NEVER be used to control the call. When you place the call on the middle of your tongue, this makes the call level. It is VERY VERY hard to learn and call this way, but it is the proper mechanics that most all of the circuit callers use. Without the call in your mouth, say the word "HEE" several time and really pay attention to what your mouth and tongue are doing. The back part of your tongue is lifting up to the roof of your mouth and the tip of your tongue is at the bottom of your mouth. Once you fell comfortable enough try it with the call properly placed in your mouth and that should give you the clean and clear front end of the yelp. Try different tongue pressures until you can make it one clear note. Then just drop your jaw incorporating the word "yop or yack" try different sounds for the back end until you like the way it sounds. It's hard! Much easier said then done. PRACTICE, PRACTICE, PRACTICE. But that is how I get my front end. Clear as mud now? LOL! I hope this helps a little or at least gives you a different technique to try and from that you can find what works for you.
