Nothing on your ChalkBlaster was perfected on a screen. Every part was bought in a dozen versions, put on a bench, and pushed until something broke. That sounds messy, and it is. It's also the fastest way we know to end up with a tool that survives a season in a chalk bag instead of a demo on a desk.
Why we stopped trusting the screen
CAD is seductive. You can tweak a part for weeks and it always looks perfect, because a model can't strip a thread, work loose, or clog with dust. Reality does all of that in an afternoon. The hard lesson we keep relearning: you learn more in one month of real testing than in six months of theoretical design.
How we actually build a part
When a part on the ChalkBlaster needs solving, it runs through the same loop every time.
Sketch it and name the pain. Draw the part and write down the exact problem it has to solve. If we can't name the failure we're fixing, we're not ready to buy anything.
Buy up to 15 versions. Every supplier, every variant we can get our hands on. Not one “best guess” part — a whole shelf of them.
Test them head to head, and find where each one breaks. Same bench, same conditions, compared against each other instead of against a spec sheet.
Commit to what held up. Pick the winner on evidence — what actually survived — not on what looked cleanest in the model.
Run the loop again on the winner. Then do it once more, until there's nothing left to beat.
15
versions of a single part we'll buy and break before we commit to one
Breaking things faster isn't reckless. It's the point.
A common trap in hardware is polishing a design for months because it feels productive. It usually isn't — perfectionism is often procrastination in a nicer outfit. Every week a part sits in CAD is a week you haven't learned how it fails. We'd rather break the wrong version this month than ship it next year.
What this means for your ChalkBlaster
Every component you hold earned its spot by outlasting roughly a dozen alternatives on the bench. The motor, the button, the brush head, the fasteners — none of them are there because they looked right in a render. They're there because they were the last one standing. You'll never see the pile of parts that didn't make it, and that's exactly the point.
From the comments
One builder put it bluntly: perfectionism often masks procrastination — the endless polishing is just a way to avoid finding out you were wrong.
Another pushed back — not every team can afford to buy fifteen of everything. Fair. But even testing three beats testing none, and the parts tell you things a spec sheet never will.
SWEEP Climbing builds tools for climbers who take friction seriously.
