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But, can I just stake on my first machine only and only start the wallet in parallel also on my second machine (without unlock)?
The reason is that my main wallet (first machine) is running 24/7 on a VM inside a NAS but I don't have always access to it.
So I also want have the wallet on a second machine to just see the current coin / transaction details and to ensure the VM not died

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Thx again.
Cheers,
JMan
No problem. And yes, you can run two or more identical wallets on different machines with only one of them staking, I do that myself with some coins.
Dr Charles, from my experience it works fine. I even tried to send the coins from non-staking wallets to the exchange and the transactions successfully showed up on other staking wallet as well without causing any issues. Been doing that for many months now, all is working smooth so far.
I haven't had a problem running the same wallet on two machines.