In order to replace the relatively weak MG90S servo, I chose the DS-S006M 12g digital metal gear servo, which has the same size but stronger performance and better durability. The Servo_Mount is the same as the MG90S servo, but the Servo_Arm needs to be slightly modified. The servo arm has been trimmed a little bit and tested to work properly, but if it is not press tight enough when working on your ERCF, you can try the untrimmed file.
Its official website describes it as 9 grams class, but what I actually got was a 12g sticker.
The author marked this model as their own original creation.