I know you said “don’t tell me to remove all my aluminum parts” but the answer is fairly obvious. REMOVE ALL THE ALUMINUM PARTS. They are dead weight and do nothing for performance. Especially anything that rotates, rotational mass will KILL your vertical acceleration. I’ve mentioned this before but that lower aluminum blade mount zaps power, use the stock plastic mount. If you have aluminum blade grips, get rid of those. Definitely swap back to a plastic chassis if you still have that and a carbon tail boom (not the Xtreme) will help also. Only aluminum on mine is the swashplate and it’s extremely precise.

Give it a try, I think you’ll be pleasantly surprised. Oh, balance those blades too, that can contribute to a tremendous loss of power. Good luck.