Eh, timing is one of the weakest things about musagi. It's rigid in that regard, but you can go to higher speeds and do swings that way. Just consider 8th as 32th and you have a lot more control about tiny time offsets. But it's tedious, of course. Maybe one day I'll have a look at it and see, if there's any convenient way of working on the timing. I don't know, yet.