Running Knots Blake2b on Start9 but need to replay protect cold storage bitcoin

[NumbSkull]

There’s a recent thread on this.

Safely Moving Pre-Fork BTC to XBT

We have some SATS BTC from before the SHA256/BLAKE2b fork. Now we want to move the corresponding XBT on the new BLAKE2b chain to an XBT wallet, while leaving the original BTC on the SHA256 chain completely untouched. What is the recommended and safest procedure to do this with proper replay protection? The BTC is currently held on a Trezor, and I have Sparrow and Shrike available. Any clear suggestions recommendations?