Ihave found by buying a chromatic tuner a great help to me in getting those bent notes correct.For example you can see draw 4 go from D to C sharp. Also it has help me to get draw 2 on a C harp correct.Before i had the tuner ,draw 2 also sounded F or F sharp. Its is a great tool for us novices
A chromatic tuner will work fine for any insturment. It is called a chromatic tuner because it tunes to all notes of the scale. I use a Korg Chromatic tuner and it was under $30. Most music stores will have them.