Hi Sam

If you are wearing a system single-handed (i.e. you don't have a wife or girlfriend who's helping you) you definitely need to invest in good mirrors - a big well-lit wall-mounted one plus a big hand-held one so that you can get a good view of the back.

If you are in a situation where you can't really tell where you are meant to be shaving, you could try this tip - put the system down into place, then sprinkle talcum powder on your head. Then flip the piece forwards and clip it up with one of Mickey's clips, and the hair that doesn't have talcum on it is the bit you need to shave. When you are done, just brush the talcum out.