Tino is in a long wood house at the end of the cage - he just has one of the small omlet hides as an extra hide (it came with the sand bath which I haven't used yet). He has two shallow ramps leading to the roof of the long house, which he is using but I've noticed he jumps off the roof rather than bothering to walk down the ramp the long way round back to his house entrance!
I was thinking about adding the Omlet Sand bath as a dig box with cork granules in and hide treats in it, but he only has about 6" of substrate right now, pressed down firm so he can walk on it better. The legs on the sand bath are about 6" so it would sit above substrate level and he'd have to try and climb in and out of that then. I suppose a small bridge up to it might be ok. I'll have a think about that. On the other hand it's not that large and he's still a big hamster.
Yes, I changed to a shoe box house as Socks would sort of throw himself through the round opening in the roof of the Omlet hide. When he got old, he would catch his hip on the edge of the roof hole which looked painful 
He did actually have some little shallow steps I made out of glueing cork rounds togethter, but offset so that it made 2 or 3 separate steps. Unfortunately I binned those as part of his cage disinfect. I did think about baking them but they had glue - plus he does seem better with a shallow ramp now. But it's such a lovely idea, thank you 
Ness