Since following this forum, I've seen a lot of mention of old Polaroid cameras converted to 4X5 for use as a hand held camera. There seem to even be several camera technicians doing these rebuilds on a commercial scale. Now, I'm not finding fault -- just curious. To me those old model 900, etc. were among the heaviest, CLUNKIEST camera design mistakes to ever come along. With all the used 4x5 graphics to choose from, WHY would anyone prefer to work with one of these Polaroid monsters? I mean -- they are twice as heavy as a Graphic, you still have a bellows, the rangefinder is NOT any improvement over the graphic rangefinder,etc. In my mind, there are more negative than positive features with the old Polaroids -- so WHY? Somebody please educate me on this one.