We tried the iron bay models fuel regulator for the first 18 test flights and set it just like directions said to and never could get a good engine run, we used both crankcase pressure and pipe pressure and had many problems...The regulator was removed and using the prior set as listed before ... I don't have any fuel draw problems at all in any flight angle.. we picked that regulator from talking with many people about the Cline or Perry set up... The only flame out I have had since going to a pipe pressure set up is when I forgot how long I was up and ran out of fuel... I'm still doing test with different props and will be trying a 4 blade 13.8x10 apc and see how it does... Both airplanes in the prior photo are the same engine set up..

scott