Say I have two links with 600 energy in them, and I would like for one of them to have 800 in it.Currently I can send 200, and 194 gets there, 6 eaten by the fee, so now I've got 400 and 794. That could still work exactly as it does now.If I try to send 207 now, I get an error, because 207 is more than will fit in the target. But that's silly, because not all 207 is going to make it to the target. Instead, an attempt to send 207 should work, and I should end up with 393 and 800 in the links.