Erm, when you go to www.nolimitscoaster.de, click progress, and somewhere you see this text about NL update 1.5: 'Besides new coaster styles and remodelled cars, the update will feature the special shuttle operation mode with several new options to allow recreations of today's common shuttle type coasters including boomerangs and lim launched impulse coasters. Another new feature will be the choice of different spine types on some coasters.'
Could some1 plz explain this: 'Another new feature will be the choice of different spine types on some coasters.'? What are spine types?