Vertical panel saw build - Looking for a DRO

[nacimroc]

Bit off topic but you guys seem ideally suited to help.

I'm half way through building a DIY vertical panel saw (see pic below). I would like to have some sort of digital read out of position, both vertically and horizontally. Instead of using a rule scale. The horizontal length is 4m which reduces my options (either not possible to get or insanely expensive). I seen these cheap ones which wouldn't work, but is there something in between the 20 quid ones and the 20 grand ones. Obviously its just for rip cutting sheets so the tolerance doesn't need to be down to the micron.




Thanks