I recently bought a pantograph after years and years of all sorts of lucida cameras, apps and projections. Pantographs are most accurate for details and stable. my art is smaller cause of that. sizing are limited in pantographs. but least I can scan my small paintings. I'll have to build a larger pantograph for that size. means bigger table. no room for that so I'll need to make a vertical table but I haven't imagine pantograph supported by pulleys and weights. think about it. Buy a regular pantograph and use it as a model to build a bigger one. I trace shapes. this one is c3. c3 out of 5. middle color of cyan, or pure cyan. c2 is lighter and c4 is darker. theres a "m" for magenta and "y" for yellow. can have "k". thats yucky black.

hint: you decompose in GIMP. try it