Yeah good man. I reckon do a 1234 style beat, real stock, and have power chords that run for at least two beats. There should be an option on the riff editor menu, on my m2k it looks like a wobbly heart beat line, if you adjust that to the right it should start playing the sample later into the sample, giving it a cleaner sound. Try that man, rreal simple stuff, and then post it. Once you have goit that down, you can use that insane melodic skill you have and build on it. When it comes to riffs mate, you have it hands down!