Wheel of Fortune or Wheel of Death?

[Chess Ref]

In our area we are strongly encouraged to go without a wheel/line-up card from the get go. Having said that yesterday I was the Umpire in a horrendous JV mismatch,so I thought I would play with using the line up card for the entire match. It definetly made things easier. When I lost track of server/positions I was able to reorient myself very quickly with the cheat sheet......

Now I would like to ask the Lords of this board a question....Why shouldn't the Referee use a "cheat sheat" ? Is it a perception issue ? Or what. There are times I am up there I lose track of server/position , can't ask scorer who next server is ,and a cheat sheet would be pretty handy to get back on track, no pun intended.....