I work with TAL and was heavily involved (and still am) in the development of the Sampler, I’ve released a bunch of sample/patch packs for it too. If there’s anything I can do to help I will spare what time I can.
The one thing I haven’t really done is import soundfonts but from all accounts it should work just fine, I’m certainly able to help shape the patches after the import is done. I’ll take a look at the J8 patch you shared.

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