The three screws have little overlap of the upper edge of the enlarger. If the bottom is not on flat ground, the force is taken across the screws on the downhill side.
The item was not in stock. Took 10 days for Sierra to get the item from Bakup and then another nine days to ship it from Nevada to Colorado. I could have ordered the item from Bakup and had it in four days. Not to mention that my credit card was charged the day I ordered it.
