We recently finished a project for a client in a tough 1500 resin on Form 3. The parts came out clean, washed for 10+10 mins, kept little under cured (50 min @70deg). But the pieces printed slightly bigger than the drawings. The part is of about 2" x .5" x .25" . Reprinted them in a different orientation and fully cured as we thought it might be the curing issue, but the part was still big for the assembly. ( We Checked the drawings, cad, and the scale ratio in Preform, the part is same)
The same issue came up with one of our Form 3 client, and his part is slightly big as compared to CAD. (0.2mm to 0.4mm )
Any insights will help.