I saw your thread; it does sound like we’re having the same symptoms.
I’m using the 23.5mm edition, and my tubes measure around 23.4-23.45 and seem pretty round, so unfortunately I don’t think that’s my issue. That’s not to say one or more of my tubes didn’t get bent for other reasons.
The new corners do wonders in getting the frame squared up! I did the same thing when I first starting troubleshooting this, and they are so much easier.
I’ll be looking forward to the outcome of your part replacements.