I always follow the rule to measure twice - cut once. Except last night. Last night I was not in the mood to sew. So I spent some time working on my newest sewing space. I was hanging some brackets for a DIY photo studio and a DIY rack for large fabric bolts. I already had them installed but decided I should move them over a foot. Because the rack for large bolts was going to be supporting heavier weights I wanted to make sure I anchored the supports into the studs. OK, I'd done it once so I just needed to move each support to the right 16" - just over to the next stud. I marked the new locations but decided to only hang one of the big brackets so that I could still access the space easily without the second bracket getting in my way. Then I eyeballed approximate center to hang the photo studio roller shades above it all. Marked, drilled, anchored, and installed all 6 little brackets. Hung the shades. Stepped back and admired my work (okay, I admit I patted myself on the back just a bit too). Then I installed the second bit bracket and tried to install the rod. Sigh. Somehow I had only moved the right large bracket over 16", but didn't mark the location of the second one. The large brackets are now 16" too far apart. If I move the second bracket to the correct location it gets in the way of the photo studio roller shades. If I re-space the fabric bolt supports to be centered on the roller shades I will not be anchoring into the studs. If I move the right side fabric bolt support over 16" I'm right back where I started. Grumble, grumble.