"To each, His own."
There are those who require total precision and then there are those who are willing to work within the limits of their tools AND capabilities.
As one who spent several years hanging 'wallpaper' I would say that you can go into any home built, older or brand new, high end or tract home and take a 4' level and check the 'plumb' of every 'corner' in the house and you will find very few that are totally on plumb and in most cases NOT totally 'square'.
Try explaining to a homeowner that the reason the 'stripes' on their wallcovering don't look right in the corner is because the walls are not 'plumb' and 'square'!
That being said I feel that my DW788 may not be totally 'square' top to bottom of the stroke but it suits my purposes and my budget.
In the 8 months I have owned my DW I have not yet encountered any project that I had to throw out because of its limitations.
Further I would be curious as to the number of DW788's sold since its introduction compared to the number of Ex's during the same time frame.
Again, "To each his own"........
~~~GrayBeard~~~