Thanks for posting this. In that FAQ question they state
Note that there is no lock-in: you don't have to use our integrated swap-out service. You can use any third-party service, there are several, with varying degrees of trust and different fees.
I saw other stuff re: supplying your own Electrum server, it needs to be signed (not self-signed) but presumably this is how I'd get it done for cheaper? That's what they mean by using "any third party service?"
Also found this other thread from SN where the guy had the opposite problem from me lol:
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