I love the shorty packs, but the added weight is critical, 1/4 oz in the corners, the 1/2 oz next to the reciever, the weight of the servo all play in.

The medium weight, 4000 mah regular packs drive ok, landings suffer. Then the heavy 5000 plus mah packs i hate, drive horrable.

I am also on GHEA pistons, and Yokomo springs. So there may be the big change.

If any of you guys that hate the shortys got some for sale let me know, i am in the market for maybe 2x. Gonna start working on my T4 shorty set up as well.