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Is it better to place the steering servo on the steering axle or on the chassis beam for a crawler? If placed on the chassis beam, would the distance between the axle and the beam change cause the front wheels to steer unintentionally? But why is this design common in...

There is a small part (called limit ring), many people may have lost it after removing it. If you don't have it, you can just use a small tie wrap to keep it running.

Like the motor and the big gears, and inside the gearbox, and inside the front and rear axles.There's not much to it, you can buy industrial lubricants or modeling lubricants, the only difference is that if it's related to modeling, it will be very expensive.The only difference is that if...

I was going to replace the output with an extension and found that the gears and bearings wouldn't come off, at first I thought it was the wrong way to remove it, but then I used a file to grind it down and it came off.

Magnetic shell is not strong, the shell will fall off when you turn over the car, not as practical as R buckle, if you want to say a better fixing method, I think it is to replace the larger specification, higher grade of strong magnets (such as higher grade N52,...

YIKONG YK4083's shock absorber is not fixed by the ball but by the rubber sleeve, the shock absorber will be slanted when pressed down, so the rebound does not work.