I'm not a very good Doumbek player, and I think that's where the rhythmic issues are. Plus I recorded it last after I played to a scratch drum track. I remember fighting between the stiffness of the scratch track and the live drums and bass.
I have not run into any decent sounding Doumbek samples; they all sound like someone slapping a cardboard box and you can hardly tell the difference between a
dum and a
tek.