More bell
The technique I developed on bells to obtain certain embellishments comes from natural effects of relaxed movements. The first thing is to avoid the eight bit sound quality too many people seem to take for a standard. An african bell should not sound like a pen on a desk!

Play the following pattern hitting the A part of the bell with the last quarter of the metal stick. I’ll call this the “A” part of rhythm.

Now let the top of the stick fall on the upper part of the bell when you lift your hand up to play the next sound. Let’s call this the “B” part. It should sound like on the following example :

Step ➊

Play the B part just next to the first eight-note.

Step ➋

Now when you lift up your hand, let the stick fall down and rebound on the bell.
It should sound like this :

Step ➌

Back to the first B part example, with more cadence this time :

Step ➍

Add the rebounds.

With practice and the right stick you can even play all the eight-notes on the "B" part using the rebound technique.

Application
Apply this techniques to different dununs patterns.