I've been running this motor for about 2 gallons now. I am very impressed with it so far.
I'm with jfc_tech on the motor temp issue. I've been running mine at the average temp of 110C and it's not where as quick as my friend's who is running his at about 140C...man that thing screamed!!!
I am thinking about switching to the STS green head .21 once I am done with this .28. My CRT is gonna flyyyyyyyyyyy.