The [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXVW07&P=7]S3004[/link] servo put out a little more torque than the [link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXH286&P=ML]S3001[/link] does. They will both work fine for your aplication. The OS.46 AX will fly the plane beautifully and you will be thankful for the extra power. The extra 3 oz will not hurt you at all. You will just have to place the battery pack a little further back to ballance. Also the .46 ax will be better suited for your next plane