So gentlemans, I'm working on a new song right now, less core with more heavy metal influences such as Metallica, Iron Maiden and other riffy/lead oriented bands. My problem is that I come up with a groovy, percussive guitar thing which is in a odd time signature. The last hi-hat on the bar last shorter than the others so when it loops you just can't headbang.

I was wondering if you guys could fix it because I'm not experienced with anything that isn't 4/4.

Thank you for you time!
That's pretty spot on! And quick! I was not expecting the solution so soon. Thank you!