i had 2 of the sig caps with satio 180 and jr 8101 servos and never did have to add lead to those babies to balance. I will do my best 2 always relocated the battery 1st (aft/forward) to acheive CG. I ran the 500cc tank and that will give me 12 minutes before it would run out of gas. I always fly 10 minute flights, it helps the next guy 2 not have 2 wait very long; sometimes we swear we are jamming but all we are doing is burning holes in the sky to the flyer waiting. Of course if you have the field 2 yourself thats a whole different issue. If you tach your motors you will notice (unless you have some special mix on throttle) that you are getting most of your RPM up to half throttle and a few more after that. 1/2 throttle will give you better gas milage of course than full throttle. But it you are getting 9000RPM at full you may have around 6500-7500 at 1/2 throttle. Now if you never fly at 1/2 throttle and you start the plane is going to seem slow to you. AS time goes on it will become the normal plus it will let you do you moves with out being rushed. I use full throttle for the uplines. Now that is were set up comes into play with prop pitch and size that so everything works as a team. Aircraft set up alone with take you sometime before its truley a bad boy in the air vise the 1-5 clicks you give the ailerons and elevators for the 1st flight. It does come down to eaches own, no harm to the flyers burning holes in the sky ( hope you are not at my field) he he......