I have a 28% extra 300, I went with the carbonfiber landing gear spinner and wing and stab tubes, I measured the weight of each item down the the gram, if memory serves me correctly for my 200.00 bucks I shaved off 1.5 lbs to me it was worth the money. I did use all graphtech except the spinner. If you get their landing gear buy the new 3d weave design, 50 plus flight and it is still fine.
If you are interested in exact weght let me know. Brenden