So, I'm a rookie mapper, and an even worse modder. I simply don't have the experience to see mistakes, unless they are blatantly obvious.
I've got a pretty good grasp on rhythm, been playing the piano for 10 years (taking lessons), been playing guitar for 7 (self taught for the most part), and is currently taking music theory classes at school (pretty high level, making our own arrangements and such). Been composing for years as well.
I will not do the timing, if it is easy, and you are just being lazy!
I don't currently have a m4m policy, but if you are interested, I would love a mod on this map of mine. It's my first map, so it's not great, but at least i should have gotten the rhythm down