Added support for

fr_do_dakota_89_sb
fr_do_dakota_89_shelby_sb
fr_pe_359_82_short
fr_pe_359_82_med
fr_pe_359_82_long

- reduced Heavy Chains for Wheelchains 4 -> 2. (Each is 10 inventory, a bit heavy with the other stuff else)

- changed Reinforced Glass required skill to mechanics, since its not a welding thing.

- fixed invisible tires

- upgrade rework
- added 2 recipes