For some reason, I find it quite difficult to improvise a good slap groove. I can play pre-existing slap lines just fine, I know how to slap very good. I can play a bunch of Flea's stuff and a couple Wooten songs just fine. But when I try to make something up on my own, I always end up trying too hard and I can't make it flow the way I want it to. Any advice on making nice flowing, grooving slap line will be very much appreciated.