The complicated riffs in our set I find are the easiest to get right cos there's no gaps to lose the time. One of the lines that sometimes throws me is our "Heavy" version of Hot Chocolate's Everyone's a winner which I thought I'd simplify through the verse with a dotted crotchet, rest, quaver,quaver, grace note type thing but I'm finding I sometimes don't get the middle rest right because i listen to the vocals too much. Hysteria is a piece of fosters compared to this.