We've now had the Scaredy Cats for two months and they're coming on leaps and bounds. Arthur sat on my head last night, I was so proud! 
Anyway, the time has come to move all their crap (literally) out of the front room where they've been based at night and into the dining room/kitchen so we can watch tv without inhaling poo fumes. My plan was to relocate litter box to new place and put a basic tray in the place of the old one for back up for a little while. If I plop them in front of newly located tray will they take it from there?