Looks very nice! 😍 🛒 One question though, is the seedsafe compatible with the SSS wallets created by the Trezor wallet? The Shamir Split Seed uses 20 or 33 words.

Whenever I guide people to create their own wallet I always recommend using the Shamir Backup on the Trezor as it is the easiest and safest way to store your bitcoin. A compromise of a single key 🗝 won't result in theft or loss of your coins.  

 There are multiple options. For 20,24 or 33 words you could multiply the number of disks for your need. 
The question is if the Shamir split is optimal. 
Looking at the current single sig + passphrase options or multisig options I believe these suit better than the Trezor option. 
In general we prefer to use open source, bitcoin only, air gapped options for signing. Currently only @SeedSigner @Foundation Passport and @Blockstream Jade are options in that respect. 
It depends on who you’re helping with the setup and to what extent they should go with this. It would actually be nice to share our work we did with bitsave and bitcoinvoorbedrijven on this. If you want more info I can get you in touch with our group. 

 Thank you for your reply, much appreciated. The Shamir Secret Sharing, is entirely open-source and offers versatility by allowing integration with passphrases and multisig configurations as needed. For instance, one can restore a Shamir Backup using Electrum, not just Trezor. 

My preference for Shamir Backup over multisig is due to its operation at the wallet level, ensuring the security of all assets within, not limited to Bitcoin, whereas multisig typically secures only Bitcoin transactions. While combining both is possible to enhance key management strategies, it is not a common practice.

Many of the people that consult me hold various digital assets (ugh yes but I don't judge), which are also protected by Shamir's method. The choice to exclusively use Satoshilabs as a wallet provider is based on their established reputation as pioneers in hardware wallets and pooled mining. Although minor vulnerabilities exist that may necessitate wallet recovery, a simple factory reset can address these issues and curb hasty financial decisions. 

Shamir Backup is favored for its straightforward approach to digital legacy planning, allowing each family member to possess a unique key, with an additional key safeguarded by a legal professional. 

 This sounds like you used ChatGPT 😂 I would stick with bitcoin only and not advise people to walk down the path you’re suggesting. Every hardware wallet/signer/electrum/sparrow can work with bip39 native Bitcoin backups. I would always advise a Bitcoin only setup for the hodling of bitcoin. It’s multi generational so I would go for a more “standard” approach. Single sig with passphrase or a multisig is easy these days. 
Have you ever tried a passport or a seedsigner? I would advise you to try it. 

 I did use Bing to rewrite yes. Problem is that many people follow false prophets like Michael Saylor. "There is NO SECOND BEST, cyber hornets bla bla bla" then once the Ethereum ETF is announced he proclaims "there is a second best." people tend to screw up and by protecting their assets on a wallet level, as opposed to the protocol level with multisig, these problems are mitigated. In addition, the hardware wallet guides them through the process of restoring, much easier for most than setting up a multisig transaction. 

I only advice people on bitcoin and would not even poke anything else with a stick and help them to securely store their bitcoin, Shamir is a good way to do that. 

The other wallets I don't even want to try, I've had some less than optional experiences with wallets in the past, dodgy hardware security, not so random RNGs, etc. so stick to what I know is good, especially since wallets for HODLing are supposed to be boring. I would for example never, ever purchase or advice people to use a ledger, no matter how pretty those new, stackable models look with their eink display, I just don't trust them.  

 I agree, we have really tried to make seedsafe as simple as possible to use, but also working hard to reducing elements and parts to make the flow and steps in the production process to an absolute minimum through countless attempts and iterations over the years. The specific12Z (zodiak) version is an enigma wrapped in a riddle, but for a good reason. The thought is to focus on making it a _backup_ as in something you go back to in order to verify something. Meaning, by design, supporting the user to actually remember the number sequence  (a.k.a. Brain Wallet) by associating numbers to the zodiac _symbols_. You do not even need to remember the sequence or order (these will never change as the constellations are sequenced in order over time across the night sky over the duration of a year) as long as you feel comfortable remembering and associating your unique number (bip-0039 index) with for example the aquarious _symbol_ and so on, this is very easy for the brain to do. We’re generally quite good at this kind of association. That was the basic idea anyway.