totally 100% agrees with niteflyer. Do everything in your powers before adding weight. Heres a couple of stories about weight. First one about me and how I aquired my Lanier 540 ARF (with motor and servos) for under 250 bucks. Some guy was flying this airplane and could NEVER get it to land right, he got VERY upset about this and finally one day on final approach he creamed it pretty good. He started taking out the motor and radio gear and heading towards the trash can with the airplane. I, of course being the patron (and businessman) that I am talked him out of it. He ended up handing me the crashed airplane (on a scale of 1-10 the crash was a 4) and all of the gear (except receiver) for $240(all I had on me). I began work on the plane and noticed that under the motor he had well over a pound of weight added. I called him about this and he said, well the plane used to be tail heavy but he "fixed that problem" with the weight. Ok. I made the repairs on the plane and took the weight off, I put my engine further forward and the battery pack right behind the firewall. Though the plane is still tail heavy, it is balanced at a great 3D setting. Since then I have many flights on the aircraft and the landings are as slow as they get for such a high performance airplane.[img]i/expressions/face-icon-small-smile.gif[/img] My 2nd story comes from a friend of mine that flies in all of the IMAC masters competitions and Joe Nall masters, and is a demo pilot for the halftime show at top-gun. He purchased a 40% Staudacher (used), took it to the field and flew it and it flew like S**T. Further inspection showed that there was a 9lb. (YEAH No TYPO) 9lb. lead weight on the front of the airplane in order to get it to banlance. After some thinking it was decided to move the wings back, until proper CG was aquired with no added weight. Since then, he has managed to take an additional 2 lbs off of the airplane by stripping it down and drilling lightening holes. Thats (if my math is correct[img]i/expressions/face-icon-small-smile.gif[/img] ) 11lbs. of weight taken off of the airplane. One more pound was taken off later by switching to Lithium Ion batteries instead of NICADS. All in all 12lbs. lighter, and the plane is now flown as a back up in competion (flies SWWWEEEEEETTTTT) and is used as his primary demo plane at various events. So, watch that weight! [img]i/expressions/face-icon-small-smile.gif[/img]