Ok, all quiet out there. Well, I believe I have answered my own question and I will share it here for the next European oxygen seeker:
General internet research tells me that one liquid drop is defined as 0.05 mL.
36% dilution inside 0.05 mL will contain 0.01800 solute (or 'pure' H202 in this case)
12% dilution inside 0.05 mL will contain 0.00600 solute (or 'pure' H202 in this case)
36% dilution inside 0.15 mL (3 drops) will contain 0.01800 solute (or 'pure' H202 in this case)
So using 3 drops of 12% for every 1 drop of 35% in the generally-accepted dosage charts (One-Minute Cure etc) will come out the same in the end (with a marginal difference of 0.0005 solute in 36% compared to 35% commonly found in the U.S.)
If you don't trust my math, feel free to work your own magic. I found this site very helpful: http://www.physiologyweb.com/calcula...alculator.html
By this logic, you can multiply your 3% or 6% appropriately. However, it is vital, of course that one use FOOD GRADE H2O2, in my non-medical-advice-giving opinion. I'm currently on 24 drops 3x daily, the equivalent of 8 drops a day using 35% food grade H2O2. My end goal will be 75 drops 3x daily, the equivalent of 25 drops at 35%. I'm eager to see what kind of results come. Best of luck to all.