Jack,the Hacker A20-20L is 1022KV compared to the E-FLite 450's of 890Kv,the Hacker would make that plane a rocket ship,depending on how long you have been flying 3D one thing i noticed was at 2-1 power to weight ratio and 3-1 and over(meaning way over powered) there was a big difference in controling it in a hover with the way over powered systems it's harder to control with so much power ,might want to try the A20-22L at 924KV if you wanted to go with a Hacker motor and not the E-Flite.In a nut shell the Hacker A20-20l would leave the 450 in the dust. IMO Olin