A build log saves you from forgetting what actually worked on your RC car. What to record, why it's for you, and how to keep one in your garage.
Here's a question I couldn't answer last spring: what diff oil did I run in my 8th-scale buggy the summer before? I stood there in the garage holding the box of oils like an idiot. 5,000? 7,000? I'd done a whole afternoon of testing, felt great about the setup, and then just... forgot. No notes. Nothing. The truck ran fine at that one track and I never wrote down why.
That's the whole case for keeping a build log, right there. Not for internet points. For you, six months from now, when your memory has quietly betrayed you.
If you were on RCTech or the old brand forums ten or fifteen years ago, you knew the ritual. Somebody buys a fresh Losi or a TLR roller, starts a thread, and posts the whole build one photo at a time. Bag A. Bag B. A close-up of the shock tower with a caption like "torqued to spec, added a drop of blue." People followed along. They argued about shimming. They came back a year later to say the front end still felt loose and here's what fixed it.
Most of that culture drained into private group chats and disappearing stories. Which is a shame, because a build thread was a living document. You could search it. A stranger in Ohio could learn from your busted spur gear without you ever talking to them. A story you posted three years ago is basically gone. A build log stays.
You don't need to write an essay for every wrench turn. I've tried that and burned out by bag C. Here's what earns its place:
Gearing, tire compound and insert, ride height, battery and ESC settings — if you fiddled with it and it mattered, it goes in. Everything else is optional.
Bench racing is fun, but the honest value of a log is boring and personal. It's the answer to "what did I have that worked?"
My Arrma Kraton went through maybe four different tire setups before I found the one that stopped ballooning on the straight. If I'd logged the first three I'd have saved a couple weekends and a set of Proline dboots I didn't need to buy. Same story with shock oil, with gear mesh, with which Hobbywing profile felt right on a cold morning. Your memory rounds everything off. The log doesn't.
And it compounds. After a year you've got a real record — this chassis likes this, that motor runs hot in that battery config, this brand of hex hardware strips if you look at it wrong (looking at you, cheap eBay screw kits). That's knowledge you paid for in broken parts. Might as well keep it.
There's a way to share your stuff that people enjoy and a way that makes them mute you. The difference is basically substance. A row of trophies with no context is bragging. A buggy with a note that says "third season on this chassis, here's what's still original and what I've replaced" — that's interesting. People want the story, not the flex.
So show the beater that's been resurrected four times next to the shelf queen. Show the ugly repair that held. The collection gets more likeable the more honest it is. Nobody bonds with a perfect car. They bond with the one that grenaded a diff at the regional and got fixed in the parking lot.
This is the part I built the site around, so forgive the home-team pitch. Your garage on RC Paddock is where the collection and the logs live together. Each car gets its own page — specs, photos, and a running build log you add entries to over time. It's the forum build thread idea, minus the forum rot, and it's searchable by you later when you're standing in the garage trying to remember that diff oil.
The build-log entries stack in order, so a car's page becomes its whole history at a glance. New shocks in April, a motor swap in June, the note from that one race where everything clicked. When you eventually sell a car — and you will, we all churn cars — that documented history does real work. A buyer scrolling your listings trusts a rig with a visible service record a lot more than a stock photo and a vibe. I've watched it move.
If you're the type who films your builds, the creators directory ties video into the same world, and there's more on how the garage and log tools fit together over on the features page. But you don't need any of that to start. You need one car and five minutes.
Bench racing never died, it just moved. Instead of standing around the drivers' stand arguing about whether 3-gear is worth it, you're leaving a note on somebody's build page or comparing your setup against theirs. Same conversation, better memory. The good part of the old forums — people learning from each other's tinkering — works even better when it's attached to an actual, documented car instead of a thread that scrolls into the void.
And it lowers the stakes on your own tinkering. When every change is logged, experimenting gets cheaper. Try the weird gear ratio. Run the off-brand oil. If it's bad you'll know exactly what you did and how to undo it, because you wrote it down. That freedom is worth more than any single setup tip.
So start one today, even a lazy one. Pick the car you run most, take one clean photo, and write down what's in it right now — before you forget, which you will. Open your garage and add the first entry. Next spring, when you're staring at that box of diff oils, you'll thank yourself.
Once you've got the log going, the natural companion is a habit of actually maintaining the thing — my notes on post-run RC maintenance pair well with a log, since the log tells you what you touched and the maintenance routine keeps it running long enough to matter.