My Brio acted up the same way last night. I had flown it with the CoolPower for probably 20 flights then all at once I had to lean it 4 clicks to get it to run right.
With different specific gravities, volume and weight will yeild different actual amounts of ingredients. MEOH(methanol) has a specific gravity of .8. Nitromethane has a specific gravity of 1.139 meanig that by volume it will actually give you more nitro in your fuel. I understand that you will have to change needles with nitro changes but I am puzzled why after the original adjustments after the fuel change, both set ups suddenly went blubbering rich.

Thanks for all the input people.
RC