sorry man, i hate to be a pedantic "Grammath Nazi", but 10% higher than 30 is 33 (not 40). And 10% higher than 40 is 44 (not 50) hehe, i get what you mean though, you got a flat "FAN% = TEMP + 10"
The fan curve is set in percentages. 40% power, 60% power etc so when I said "I have my fan curve set to 10% higher than what the temp is", it meant 10% of what the fan curve power is.