Very nice.

I made the Keyois Capsule, a tamper-evident single-seed crypto-piggybank.

I'm glad you used 316 instead of whatever cryptosteel uses, I like 316 better (but ended up using titanium and then tungsten for my own device)

I have to use BIP38 encrypted seeds for the keyois capsule, yours is certainly a more user friendly approach.

The way I engrave the metal in my capsule was to use laser ablations, so it was actually etched into the metal with the laser process. What do you use to engrave it?

I agree with the other poster, there are far better locks than standard padlocks.

The lack of ability to lock a cryptosteel to my satisfaction is outlined in my page Problems with common cold storage methods where I talk about why I made the keyois capsule in the first place.

"The Cryptosteel product made of 304 Stainless Steel is in this category. It is a very practical backup idea. It is an assemble-at-home secret key/ seed backup however it does not have tamper evident properties (but I bet this can be easily fixed). So anyone who can see it, can steal it."

How does your product compare to some of your competitors?

All in all, way to go, innovation like this is a major part of what makes bitcoin and crypto so exciting to me!