Elevator/Telescopic Arms & Motors to Use

[Ravage457]

Hello Chief Delphi Communty

Im Back for more wisdom from the FRC and CD community
Ive been intrested in knowing what is the most simple arm to build, an elevator or telescopic arm and how to prevent it from over extending, another question is do yall use Bearings in the arms to allow it to travel free?

Also, how do yall run the pnuematics and electrionc wires in this type of arms and keep them from getting pinched or ripped apart

What motors are also good to use with this arms?
If you have any pictures it greatly appreciated. I know im probably asking alot, but i really want to improve my knowledge and better and to improve our team. Thanks again for taking your time, and giving me yall advice and recommendations