Living with the flaws, and what to build next
The shelf is on the wall. It's level — or level enough — and it's holding weight, and you're the one who built it. That's the whole class, right there, finished.
So. What now.
Look at it honestly
Go stand in front of your shelf for a minute. Not right after you hang it, when you're just relieved it's up. A day or two later, once the adrenaline's worn off.
You're going to see things. A gap at one joint that's a little wider than the others. A spot where the sanding didn't quite chase out the swirl marks. Maybe a screw head sitting slightly proud of the surface because the wood turned harder than you expected right there. I promise you it's there, because it's always there. Nobody's first shelf comes out clean.
And that's the part worth settling in your mind. It isn't a failure report — it's simply what a first build looks like, and it's worth deciding right now how you're going to feel about it, because you'll be looking at this thing for years.
My own first shelf was cut a quarter inch too short on one side. I measured from the wrong end of the tape — which is exactly the mistake I now spend half a class trying to keep people from making: measure from the same reference edge every time, don't jump around, because your errors stack up on you if you do. I didn't catch it until it was already up on the wall, sagging just slightly on the short side. I hung it anyway. Not great, but it held. It stayed there four years before my wife Mary finally asked why one edge dipped a little. Four years. Nobody else ever noticed. I noticed every single day, and it didn't stop me using that shelf for four years of family history boxes.
So that's my answer for what to do with the flaw. Mostly, live with it. Let it be the thing that tells you which shelf was the first one.
When it's actually a problem, versus when it's just a mark
There's a difference between cosmetic and structural, and it's worth being honest with yourself about which one you're looking at.
Cosmetic: a rough patch, a slightly visible glue line, an uneven stain color, a screw that isn't perfectly countersunk. Live with those. Sand them down more if it nags at you, but don't take the thing apart over it.
Structural: a joint that flexes when you push on it, a wobble that wasn't there right after clamping, a crack that's actually growing. If you push on a corner and feel movement, that's not a look-at-it-later problem. Take the weight off it, figure out which joint is moving, and either reglue and reclamp or get someone to look at it with you before you load it up with your grandmother's photo albums. A shelf that fails is a mess, and possibly a mess on your foot. Don't be precious about pulling it back down if something's genuinely wrong.
For everybody else, most of what you're seeing is cosmetic. Let it be.
What to build next
I get asked this a lot at the end of a session — what do I build after the shelf — and I'd rather answer it straight than hand you some big exciting list.
Build another shelf. I mean it. Same design, or close to it, in a different size, for a different wall. The reason isn't that it's more useful, though it probably is. The reason is that everything that felt hard this time — the marking, the glue-up, the square check, the sanding you didn't want to do — all of it gets a little more automatic the second time through. You'll catch yourself not needing to think about the reference edge. That's the whole game: running the same basic moves enough times that your hands know them before your brain has to work it out.
After that, a small box is a fine next step. Same joints, same square-checking, smaller and a bit more forgiving because there's less wood to fight with. Sanding a box is a good teacher too. I dropped one on my garage floor once after a whole Saturday of sanding, chipped the corner, filled it and sanded it again, and ended up liking it better with the story still in it. Which is sort of the lesson of this whole last class. The story stays in the wood whether you want it there or not.
A step stool's good as well, if you need one. Just measure the actual height you need twice as carefully as you think you have to — that's a different lesson for a different day.
Before next time
No homework, really. Just live with your shelf for a week before you decide what you make of it. The flaws you notice on day one usually aren't the ones you'll still be seeing on day thirty.