Sorry missed the questions .. glad you got it installed!
I haven't had any problems with using the house battery ... I keep the engine running when running the leveling pump but even if you run it straight off the battery, it's not that big a deal because it's only a few seconds on each side when the load really kicks in ... sort of like running a winch.
Now to give my almost 2 year update! I have had 0 issues ... LOVE the setup. What I used to dread with setup and teardown and leveling now just takes a few seconds. Also I have had the wheels off the ground on several occasions and everything has held up great. I'll try to post a few pics of it in action since I've put a lot of use on these jacks!
Which reminds me I should dig up and post a few pics of my other installs with the spare tire carrier, inverter, and dish antenna
It's a never ending project fest with these things hehe.
Edit: One thing that is probably worth stressing about any high-current battery wiring, it's better to keep your high-current DC wires as short and thick (low gauge) as possible.
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