Probably the one I described in the blog post: make a low-feerate self-send on the Bitcoin chaintip, then spend the same UTXO to a different output on the RDTS chaintip.

Murch

users vying to retain independent control of their coins on both chains should be sure to separate their UTXOs in some manner.

bitcoin

bitcoin_beginners

On the Lack of Replay Protection

> users vying to retain independent control of their coins on both chains should be sure to separate their UTXOs in some manner.

Easiest, nontechnical way of doing this?