Restretch your own frames or start getting paid to restretch other businesses frames.  Achieve high tensions and save or make money with these machines.  These manual tensioning machines have a final  pneumatic lift that presses the frames up into the mesh to get even higher newtons.  Cost is only $3500 for a 115cmx150cm table or $6500 for a 150cmx250cm.  call me for details....   attached is a data sheet for the machine.