Yes, I realize I should probably consult a tax expert / CFP, so I'll take any input here as worth what I paid.

As part of a settlement, I need to transfer some of my retirement assets via a custodial transfer. As I have assets in both pre-tax and post-tax accounts, my thought is I'm better off taking those assets from my pre-tax account. (Whereas taking from the post-tax account would actually be more value than required since I've already paid income tax on the contributions.) Am I thinking about this right? Are there any disadvantages?