I recently made a trip home and picked up my Father's old Kodak Retina III Automatic. I am sure it has not been used for 20 plus years. When I first tried firing the shutter, nothing. The camera would wind and shutter button would depress, what sounded like the shutter releasing was heard. The shutter was not firing. After many many attempts the shutter is now firing sometimes. I am making sure the frame counter is reset to 36 and repeatedly firing the shutter. It is operating at about 7 out of 10 attempts. The aperture blades are slow to close down as well. I emailed Zack's Camera Repair and they responded saying they do not work on this type of camera. Questions: Any other locations that will work on these cameras and give it a good going over in the US? Will I do it harm by continuing to operate it to loosen it up? Any help or tips would be greatly appreciated.