I just got my first enlarger.(used) I put it all together and put my neg in but was surprised that the image was not exactly square. The top of the image is smaller then the bottom. I can not get it to be an full 8x10. The image is clear, but the size is not an exact square. Like this shape. _____ \____/ If that helps. Please if anyone knows wht I am tryig to talk about and that can help me fix it, please let me know.