Maybe i am going to make the "ofna fuel tank mod" and i have some questions:

Those are the parts i need, right?:
tank ofna part #40109
bellcrank posts part #4944.
Where I put the tank? I already removed the battery box
If i need make holes, please, give me the measures.
Is a noticeable difference between the stock tank and the ofna tank? I know the ofna tank fix the "half tank problem", but really help with that problem?

Ps: sorry if i have problems with my english, is because the "spanish autocorrect" in my iphone.

Thanks for reading