[Improvement] Improve how the Futaba 3003 fits in the foot

[Obijuan]

The Futaba 3003 servo does not fit well on the foot. It have to be pressed hard. It is also difficult to remove. It would be better improve this part, so that the servos can be attached and detached easily

[cparrapa]

Had same issue also the pin in the back limit the use of one kind of m3 screw.

[arodriguezf]

I had the same problem

[jabyrd3]

I had to file down a small fin on the plastic support tabs to get the futaba servo to fit at all. Pressing hard didn't even do the trick.