Cheap upgrade
Head over to Valuehobby.com.and get two Power HD 1501MG's and there direct drop ins. These are 200+ oz servos with decent speed. But I used a pair in my brushless Summit as the 2075's weren't cutting it at low speeds.
These have been my go to budget servo for years. I've never been disappointed and I've referred many people who purchased them and they all have thanked me. You can't beat em!