Austin, I think you can do what you suggest. The issues would be whether the plan or loan procedures allow the participant or someone else to choose the source(s) for the loan...presumably at the time the loan is made. If so, then I don't see why they couldn't change it (the source) later. If not, well, I don't see why the policy couldn't be changed. The whole thing seems like a big PITA but I get the reasoning - the alternative being a bigger PITA (maybe). I'm not sure I would "go there" but I give you some points for cleverness.