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1. In the first post off this thread it says this "If you have many different inputs, I suggest to consolidate them in multiple steps. Don't create a 100,000 bytes transaction with 500 inputs, but instead create many transactions with 20-ish inputs." Is this still a recommended plan?
It doesn't need to be 20, I'd probably go up to 50 now. It's not a hard limit.
Why not all at once? Is doing smaller chunks more likely to be accepted? or is it just not having all your eggs in one basket?