The response to this project has been amazing so far, please keep sharing it!
I thought I'd share a photo of the latest machined samples which have arrived, demonstrating a couple of different levels of sandblasting finish (making one slightly more textured than the other). Which do you prefer?
Speaking of machining, this card holder has some very nice machining work too with a subtle texture in it. Check it out! https://www.kickstarter.com/projects/1631052937/matrix-titanium-and-carbon-fiber-credit-card-holde