How to mount and balance mirrors for spirograph project

Step 2 Mirror mounting

To attach mirror I use 3/4" double sided sticky tape (mounting tape). I think this kind of stuff is available at any hardware store.

Make sure back side of fan is clean. Remove any label if there's one because its glue is not   designed to hold  anything heavier than thin paper so mirror may fly away at the middle of show.

Cut square piece of tape and stick it onto fan.
Remove protective film from tape, trim it, fold it in half  then put it back onto tape as pictured.
Make sure size of folded film is about 1/4 of whole piece length.
Now put  mirror onto tape. Try to align centers of mirror and fan as best as you can.
After you've installed mirror, folded film forms accessible pocket under mirror.

Mirror tilt can be set by inserting piece of paper into this pocket but it should be done  after balancing operation..