I noticed the cone slides just as easy up the stairs then down the stairs its seems like a ramp in both directions. but again if the stairs have a five inch rise with a hight of seven stairs the AV is only 3' 1" tall unless im missing something. in the case of the stairs at 45 degree's walking up a ramp at a 45 degree angle should not be that difficult, in fact their is a table in the Pub (the Pub near the Great Stairs) that got knocked over and is at a 63 degree angle and can be traversed just as easy as a stair well at a 30 degree angle walking up and down. So at least thats not a problem. In theory it is possible to convert to Uru Live assuming these are the only issues.
in any case this project seems to be causing to many problems and the way it looks its more then likely to be dropped. It was loads of fun producing it in AutoCad its just a shame no one wants take it to the next level
I just wish I had time to learn blender sufficiently to do it myself.
Thanks for trying