Taking auxiliary battery out replace with dual battery

[Bug out]

Has anyone taken out the auxiliary battery and used the dual battery system you can buy off the internet.
I have seen these Utube videos and it looks pretty easy,
If you have done it, what problems, if any did you encounter, and what dual system did you replace it with?
Thanks,

Chris

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[Mr._Bill]

Unless you do a DIY type setup, the only kit available is from Genesis. There are a few threads on the Genesis kit.