hi, i bought a used dunco67II some month ago and i have a problem where i don't find the failure. i can only get the photo on the left or right side sharp it don't work with the whole photo - i checked it a thousands of time and when i put the mask-board on the unsharp side around 0,3 inch higher it gets here too sharp. it is stupid and i can somehow imagine what the reason could be but nothing i do changes this matter. it really sucks. i would be so thankful for any help in this matter because i don't know anymore what i could do.