For the current project I had to take is 3D model file and convert it to a 3D printable file, not too difficult. The print took 10 1/2 hours at 25% infill using PLA. I only charged him $10 knowing that he will use the first print to see if it will work, fit, need resizing, etc. Right now it's only about 71 mm high and 64 mm wide. He's designing something about a solar sensor and the item I'm printing will hold the sensors so the final print will have to be at least ABS with a higher infill. I'll probably charge about $20 for that one.