Bed size of S3 vs UM3

[NTwoO 8]

Recently I upgraded from the UM3 to the S3. The S3 is a very nice upgrade. Thanks, guys.   What I do notice is the Y axis of the S3 has 10mm less range than the UM3. It so happens that one of my projects fitted on the UM3, but fails to fit on the S3. Looking at the boundaries there should be space available on the axes to do the last bit, but I can't access it. I can understand the choice to have a print bed with the full size as promised being available and thus limit the size to match the promised range, but it does look as if the printer has the extra range and it is artificially blocked. Is there a way to access this extra range?

[Dustin 160]

All UltiMaker printers have always had large build plates than their print volume.
As for the size of UM3 vs UM3S yes the volume is a bit smaller on Y 

As for pushing the limits of the ranges it really depends on your slicer settings.. use of brim, dual extruder, etc..

[CarloK2 4]

I don't know if it was for the same reason, but on the UM2+C, the y-size became smaller because UM wanted to improve the printer's reliability. The UM2+ and UM3 have the y-switch on the left side of the printer but the wires to this switch could get damaged by moving parts. Moving the switch to the right side of the printer got the wires away from moving parts, but with the drawback that y-dimension was 1cm shorter. Perhaps the same reasoning applied to the S3.

On the positive side, the S3 has a wider housing than the UM3 which allows both print heads to use the full x-size. On the UM3, the left nozzle could reach the left part of the build plate but not the right side and vice versa for the right nozzle. This was fixed on the S3 which now can reach the full x-dimension with both nozzles.

Perhaps your design fits when you rotate it 90 degrees? 
Also, in Cura there are multiple settings which limit your maximum dimensions. Brim and dual extrusion have been mentioned, but there are a few more. See this article.

Edited February 6 by CarloK2