Thanks for the info..
I don't have a .70 supass to test against the Manum but I do have a couple of Saito .72's.. The Magnum is swinging the 13X6 APC around 500 rpm less then the Saito's do... But like I said it is only on it's 5th tank and still set rich to break in... Word from others with Mag's and Surpasses is the Mag puts out somewhere between the OS and the Saito's... Biggest question in my mind is how is it going to hold up..