Vandersteen Quatro sub setup

I am a happy owner of a pair of Vandersteen Quatro, I love their incredible sound!!

I'm trying to follow the sub eq calibration procedure to set up properly in the room, I'm not convinced that I understood the procedure perfectly.

I kindly ask your support ..

With a Spl Meter and Vandertones files downloaded directly from RV Site,  I completed the procedure on the left speaker, adjusting the volume of my Ayre preamp for 2/3 of the 1/11 tracks to sound above 70 dB and 1/3 below. then I set the equalizer bands to 25% of the difference obtained from the spl meter above and below 70 db.

for Example:  for 76 db I selected +1,5 on the respective eq band ..
Do you think is the correct approach? I mean .. instead of compensating for the gap between the value 76 above 70 db, do I still have to increase the equalizer parameter?
I continued the procedure playing tracks from 12 to 22, then I adjusted the low frequency level of the right speaker so that 2/3 of the tracks sound at 70 decibels or more ..and I note on a notepad exactly the db obtained.
Is it about these last data that I have to set the bands of the right eq speaker? .. i Suppose always considering 25% of the difference compared to the usual 70 decibels, right?

I do not know if I could explain correctly, I apologize for my not really perfect English ..

Thank's a lot

best regards