After browsing this forum and comments from LR folks via email, below are some suggestions I've come across:
1) Keep the LR in the box with holes cut out (per manual).
2) Don't let them see it operate (keep unplugged) until they are steadily using it.
3) Play with them and pet them near the LR so they get used to it.
4) Praise and give them treats (turkey baby food is good) when they go near it or use it.
5) Build a ramp for unathletic cats.
6) Keep the drawer clean so the smell doesn't keep them away.
7) Keep small amount of baking soda (silica crystals?) in the drawer to absorb moisture and odors in the drawer.
8) Use Cat Attract brand litter. ?
9) Spray Feliway on the back of the inside of the globe. ?
10) Have a Feliway diffuser in the room with the LR. ?
Any other suggestions? (Anyone have any experience with trying Feliway or Cat Attract?)

