I agree with your plan Abu. A little safety margin is always good on maidens. I wish I could be your caller and help with any trim settings. Although I bet you have very little trim needed after all the checking.

Flight impact would be a longer takeoff run as you may need slightly more elevator to rotate if nose heavy. Also as you throttle back, nose would drop more than usual. Control is well within the normal throws to bring her in. With that amount of incidence, I see no real effect for you if slightly nose heavy. Later you can remove the small weight and go back to original.

Most designers use a more forward CG range to ensure success by average flyers. You are above average and will love that plan!