Mannyrock,
I use sliders for carpet, they work like magic on carpet.
No, I do not use the tri rollers for moving a layout, I like to use volunteers.
One of the biggest layouts on OGR used dozens of tri rollers on a hard surface floor with success when he cut it apart to enlarge his pike. He used lots of volunteers to raise the platforms up onto the rollers.
At $60 per dozen of HF tri rollers plus some helpers vs damaging a layout...I would go for the rollers, then sell them on Craig's list.
Personally, most all of my layout is mounted on cinder block walls without legs. Nothing is moving.
Modules from my previous layout and other assorted left overs are mounted on the painted knees.
