4 Wheel steering Question

What is the diffrence in the Jbeam of the normal pessima and the 4 wheel steered one? And is it possible to introduce it on the other ones per mod?

 

Steerable rear suspension has rails, slidenodes and hydros to allow articulation of the moving parts:

Code:

 "rails":{"4ws":{"links:":["rx3rr","rx3r","rx3l","rx3ll"],"broken:":[],"looped":false,"capped":true}},
 "slidenodes":[
 ["id:","railName","attached","fixToRail","tolerance","spring","strength","capStrength"],
 ["4wr","4ws",true,true,0.0,12001000,190000,190000],
 ["4wl","4ws",true,true,0.0,12001000,190000,190000],
 ],
 "hydros":[
 ["id1:","id2:"],
 {"beamPrecompression":1.0,"beamType":"|NORMAL","beamLongBound":1,"beamShortBound":1},
 {"beamSpring":1800600,"beamDamp":0,"beamDeform":44550,"beamStrength":123250},
 ["f4l","4wr",{"factor":-0.065,"inputSource":"4ws","beamPrecompression":"$toe_RR"}],
 ["f4r","4wl",{"factor":0.065,"inputSource":"4ws","beamPrecompression":"$toe_RL"}],
 {"beamPrecompression":1.0,"beamType":"|NORMAL","beamLongBound":1,"beamShortBound":1},
 ],

Likely, some structures for the "fixed" parts are different, too.