Why does the new "any LCD" kit have 5 holes ?

An early adopter asked me about the 4 small extra holes in the laser cut acrylic frame of the new kit. Yeah - I forgot to mention that this design is also meant to be mounted on strings infront of over/under paintings and big 3-D prints inkjetted to canvas. Remember - the bigger the picture pair, the bigger the sweet spot distance to view from with the KMQ viewer.
As a local printing service in Berlin/Germany for fine art digital canvas printing I recommend Whitewall.
I'm still looking for digital artists and stereo photographers to exhibit their work in this all new form.