Going through this process now on my -7. Squeeze the light wing trailing edge / lower the heavy wing aileron.
I'd suggest you check section 5 of the updated build manual which has pictures of what the trailing edges should look like. It's possible your new aileron is under / over squeezed. Makes a huge difference.
RV-7 Tip-up - Flying!
XP Superior IO-360 w/cold air sump, Catto 3 blade prop
CFI, CFII, MEI