JoeV
Thin Air, Bright Sun
Light edges of your picture can be caused by the condenser in the enlarger being miss adjusted. I like to set my enlarger's condenser to give slightly more exposure to the edges. This adjustment is made with a bellows like mechanism just above the enlargers lens.
I would also suggest for you to develop the print to completion, using a standard development time and adjust the print exposure in the larger instead.
I would also suggest for you to develop the print to completion, using a standard development time and adjust the print exposure in the larger instead.