need help for fix R(PS13) mod

i lost my motivation for this mod, but im not gonna abandoned this mods
there's some need to fix this the mods


-the ps13 trunk coupe version need to fix (im not jbeam expert)

the parts need to add but i can't do it
-custom suspension
-add digital dash gauges

THE material of this mod use material.cs there's no material.json
i add PBR for mod on beamng world map editor i save but when clear cache the material is gone, the only to avoid it is move the mod file from somewhere then clear cache if is done move the mod to the beamng file where the at

this mod is not done but i need help for fixing that i can't fix it

"im not good at jbeam, only modified"

the only im not at is jbeam

it almost a year.

i add some parts, unused file, and PBR
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i need help for fix that jbeam on coupe version

and add custom suspension. please
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please help for fixing the jeam on coupe trunk

and add custom suspension
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please need help for fixing coupe trunk parts

and add custom suspension