Hello guys,
I'm an entusiast girl in this amazing hobby, so please be patient with me, and also with my english (I'm from Argentina)
I got an e revo a few months ago and I love it.
I have two problems with it right now
First, I don't know why, but when my merv goes backward moves like crazy, Im uploading a video so you can see what I'm talking about

Maybe you know the reason why and I will appreciate if you tell me

And second, I just bought a HS-85mg+ servo, and cut one of the white pieces that came whit it to make a horn that fits whit my merv, but aparently I did it wrong, because it turns more for a side than the other one, here some pictures.

To this side it turns more
http://imageshack.us/a/img833/977/img0536ec.jpg
than to this side
http://imageshack.us/a/img690/6494/img0548fej.jpg
And here my horns
http://imageshack.us/a/img21/7416/img0535jf.jpg
And I ordered a blue half metal horn that fits the new servo, but I have to make a hole so it can fits the revo, so I'm just asking you guys if you can give me your opinions where do I have to make the hole in the blue horn, becouse I think that in the white one I make it too close, maybe thats why it didn't turn to both sides equally. The black one is the stock one.
Thanks!!