I found a great paper stretcher from the UK. It was worth the shipping costs to the US.
this is so simple
to use, no nuts , bolts the paper gets a nice looking edge.
Also , I have arthritis in my hands and this was very easy to use.
Lightweight and I think one could get a larger sized one and attach it to a tripod.
Customer Service was great , he made me one to match US paper sizes. I will now order a larger one
i love these little icon guys!