The limitation of Illustrator's drawing field is killing me.
I can work in scale, designing advertising fro buses, of course, but through years I had many expensive mistakes because of it.
I found a theory about 227.5" limit which says that a signed 16-bit number can store a range of numbers from about -16383 to 16383. So when 16383 is divided by 72 (default resolution) we come up with 227.5416(6) inches.
If there is no really way to extend PostSript or whatever has this limit coded within? Why CorelDraw and newer software can work with real relative units, when AI still can't think out a way to recalculate it's bondage to the point and inch? Even simple usage of 32-bit numbers could solve it.