Well, I'm not sure about no tax consequences when converting from a normal IRA to a Roth IRA. A quick Google yielded the following article, which seems pretty clear. Hopefully, since you are contributing after tax dollars to your IRA, perhaps the info in this article does not apply to the portion of your IRA that was bought with after tax dollars (?). Just out of curiosity, why are you contributing after tax dollars to an IRA in the first place?
https://www.thebalance.com/who-should-not-convert-to-a-roth-ira-2894480
Hope this helps,
